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Well, the inevitable hacking of Apple's latest flavor of iPhone has happened. Named "purplera1n," the tool will only allow installation of unauthorized applications instead of a full unlock. "The purplera1n jailbreak will free your iPhone from the limitations imposed on it by AT&T and Apple. After jailbreaking, a user will be able to customize the iPhone with home-screen wallpapers and third-party ringtones. But the biggest advantage of jailbreaking is the support of unapproved apps such as iBlackList (blacklists and whitelists for contacts) and many others."

Tim O'Reilly wrote in Forbes a while back that he thinks the Kindle only has another two or three years of life left, unless Amazon wises up and embraces open standards. He came to this conclusion, in part, because of his experience deciding how to publish documents on the web back in the mid-1990s. "You see, I'd recently been approached by the folks at the Microsoft Network. They'd identified O'Reilly as an interesting specialty publisher, just the kind of target that they hoped would embrace the Microsoft Network (or MSN, as it came to be called). The offer was simple: Pay Microsoft a $50,000 fee plus a share of any revenue, and in return it would provide this great platform for publishing, with proprietary publishing tools and file formats that would restrict our content to users of the Microsoft platform. The only problem was we'd already embraced the alternative: We had downloaded free Web server software and published documents using an open standards format. That meant anyone could read them using a free browser. While MSN had better tools and interfaces than the primitive World Wide Web, it was clear to us that the Web's low barriers to entry would help it to evolve more quickly, would bring in more competition and innovation, and would eventually win the day."

Earlier this week, we discussed news that games industry veteran Dave Perry had posted a demo of his upcoming cloud gaming service Gaikai. Now that people have had time to speak with Perry and evaluate the demo, reaction has been surprisingly positive. Quoting Eurogamer: "What struck me about the presentation was that there was absolutely nothing unbelievable in it whatsoever. There were no claims of streaming 720p gameplay at 60 frames per second — games were running in differently sized windows according to how difficult they were to compress, and video itself runs at the internet standard 30FPS. There was no talk of world-beating compression systems that annihilate the work of the best minds in video encoding today, the demo was using the exact same h264 codec that we use ... And finally, there was nothing here to suggest that we were looking at a technological breakthrough that would make our PS3s and Xbox 360s obsolete... just that this was a brand new way to play games in an ultra-accessible manner." By contrast, OnLive was received with much more criticism, in part due to their dramatic promises. While playing online games with Gaikai will naturally add some amount of latency, the article points out that single player games need not lag more than you'd expect from a console controller. Meanwhile, unlike OnLive, Gaikai is not trying to compete directly with the major console manufacturers, instead trying to work with them in order to deliver their first-party games to new audiences.

CNet has a story about the security measures Google employs to protect their email systems and fight the never-ending war on spam. Their Postini team, acquired two years ago, has a variety of monitoring tools and automated response systems to find and block undesirable messages. Quoting: "The system scores each message on numerous combinations of criteria, assigning a weight to each and then comparing the score to those in a database of several hundred thousand message types that have been flagged as good or bad from Postini honey pots and customer spam reports. ... To block fresh spam attacks not covered by existing heuristic technologies and viruses not covered by existing signature databases Postini relies on proprietary Zero-Hour technology to identify new outbreaks that show up in the traffic patterns and quarantine them for later rescanning. Customers can also create and build out their own white lists of message senders they trust and blacklist others they don't trust. It takes an average of 150 milliseconds for a message to be scanned by the antivirus engines that Postini licenses from McAfee and Authentium.

NicApicella writes "My new system has two sparklin' SATA drives which I would like to mirror. After having been burned by a not-so-cheap, dedicated RAID controller, I have been pointed to software RAID solutions. I now stand in front of two choices for setting up my RAID: a Windows 7 RC software RAID or a hardware RAID done by the cheap integrated RAID controller of my motherboard. Based on past experiences, I have decided that only my data is worth saving — that's why the RAID should mirror two disks (FAT32) that are not the boot disk (i.e. do not contain an OS or any fancy stuff). Of course, such a setup should secure my data; should a drive crash, I want the system up and running in no time. Even more importantly, I want any drive and its data to be as safe and portable as possible (that's the reason for choosing FAT32), even if the OS or the controller screw up big time. So, which should I choose? Who should I trust more, Microsoft's Windows 7 or possibly the cheapest RAID controller on the market? Are there other cheap solutions?"

SilverEar writes "Imagine a creature that swims and preys on others, but once it eats a certain kind of plant, that plant grows inside it, causing the predator to lose its ability to prey and start using sunlight to make its food. Its preying mouth is replaced by an eye that is needed to find sunlight. This is the Hatena ('enigma' in Japanese). The kicker: when Hatena reproduces, one offspring is a peaceful photosynthesizer with the sun-seeking eye, while the other is yet again a predator with a voracious mouth."

Hugh Pickens writes "Using Netflix as a business model, Osman Rashid and Aayush Phumbhra founded Chegg, shorthand for 'chicken and egg,' to gather books from sellers at the end of a semester and renting — or sometimes selling — them to other students at the start of a new one. Chegg began renting books in 2007, before it owned any, so when an order came in, its employees would surf the Web to find a cheap copy. They would buy the book using Rashid's American Express card and have it shipped to the student. Eventually, Chegg automated the system. 'People thought we were crazy,' Rashid said. Now, as Chegg prepares for its third academic year in the textbook rental business, the business is growing rapidly. Jim Safka, a former chief executive of Match.com and Ask.com who was recently recruited to run Chegg, said the company's revenue in 2008 was more than $10 million, and this year, Chegg surpassed that in January alone."

goran72 writes "A new image, taken with an infrared camera on the Subaru Telescope in Hawaii, has revealed a cosmic fireworks display, in the form of tens of thousands of previously unseen comet-shaped knots inside the Helix Nebula. Unlike previous optical images of the Helix Nebula knots, the infrared image shows thousands of clearly resolved knots, extending out from the central star at greater distances than previously observed. These images enable astronomers to estimate that there may be as many as 40,000 knots in the entire nebula, each of which are billions of kilometers/miles across. Their total mass may be as much as 30,000 Earths, or one-tenth the mass of our Sun."

In 1987, a study published by Jim Gray and Gianfranco Putzolu evaluated the trade-offs between holding data in memory and storing it on a disk. Known widely as the "five-minute rule," their research was updated and expanded 10 years later. Now, as jamie points out, Communications of the ACM is running an article by Goetz Graefe with another decennial update, evaluating the rule using hardware and software typical of 2007, with an eye toward how flash memory will affect the situation. An excerpt from Graefe's conclusion: "The 20-year-old five-minute rule for RAM and disks still holds, but for ever-larger disk pages. Moreover, it should be augmented by two new five-minute rules: one for small pages moving between RAM and flash memory and one for large pages moving between flash memory and traditional disks. For small pages moving between RAM and disk, Gray and Putzolu were amazingly accurate in predicting a five-hour break-even point two decades into the future. Research into flash memory and its place in system architectures is urgent and important. Within a few years, flash memory will be used to fill the gap between traditional RAM and traditional disk drives in many operating systems, file systems, and database systems."

PCWorld recently tested the 3G networks of AT&T, Verizon, and Sprint in 13 different cities across the US. They've now posted the results, which show that Sprint and Verizon are neck-and-neck for reliability, while AT&T has consistently higher upload rates. From the article: "Across more than 20 testing locations in each of the 13 cities we tested, Verizon had an average download speed of 951 kbps. Verizon demonstrated good reliability, too; the network was available at a reasonable and uninterrupted speed in 89.8 percent of our tests. Sprint's 3G network delivered a solid connection in 90.5 percent of our 13-city tests. Sprint's average download speed of 808 kbps across 13 cities wasn't flashy (at that speed, a 1MB file downloads in 10 seconds), but dependability is an important asset. The Sprint network performed especially well, both in speed and in reliability, in our test cities in the western part of the United States. The AT&T network's 13-city average download speed in our tests was 812 kbps. Its average upload speed was 660 kbps. Reliability was an issue in our experience of the AT&T system: Our testers were able to make a connection at a reasonable, uninterrupted speed in only 68 percent of their tests." What have you noticed about the various carriers in your city?