Bridgette Steffen writes "In attempt to slow down desertification, a student at London's Architectural Association has proposed a 6000 km sandstone wall that will not only act as a break across the Sahara Desert, but also serve as refugee shelter. Last fall it won first prize in the Holcim Foundation's Awards for Sustainable Construction, and will use bacteria to solidify the sandstone."

jcatcw writes "Steven J. Vaughan-Nichols reports that CAPTCHA cracking isn't that difficult these days. It has even become a business. For example, DeCaptcher.com will solve CAPTCHAs for your spamming needs at a rate of $2 per 1,000 successfully cracked CAPTCHAs. In response, newer systems are in development. Both Carnegie Mellon and Penn State (is there something about the water in PA?) are working on image-based systems. ESP-PIX and SQ-PIX both require the viewer to interpret pictures. Imagination CAPTCHA from Penn has the user find the center of an image. The idea is that humans are better at image recognition that computers, but humans can legitimately disagree on their interpretations and some humans are color blind. Problems remain. For now, sites would be well advised to look at reCAPTCHA — the system that works with Google Books and the Internet Archive to digitize printed texts — which comes with a wide variety of application and programming plug-ins and an open API."

An anonymous reader writes "Blogger and ex-Linspire CEO Kevin Carmony reports that Michael Robertson has been sued by a Linspire shareholder to get to the bottom of what happened to Linspire's assets. One hundred shareholders have been left uninformed as to what happened to the company and its assets after Linspire was sold to Xandros a few months back."

GovIT Geek writes to tell us that third-party websites will no longer be off limits for members of the US House, provided that they use it for "official purposes" and not personal, commercial, or campaign purposes. "The rules are seen by House Administration Chairman Robert Brady as a compromise between several proposals under consideration in recent months and are closely aligned with those circulated by the Senate Rules Committee last week. [...] 'These new guidelines are a step in the right direction for a Congress that has been behind the technological curve for too long,' Boehner said. 'By encouraging the use of emerging and established new media tools, Congress is sending the message that we want to speak to citizens, and receive feedback, in the most open and accessible manner possible.'"

stevedcc writes in to tell us about an interview with RMS in The Guardian, in which he gives his views on cloud computing, with a particular focus on user access to data and the sacrifices made for convenience. "'It's stupidity. It's worse than stupidity: it's a marketing hype campaign,' he told The Guardian. 'Somebody is saying this is inevitable — and whenever you hear somebody saying that, it's very likely to be a set of businesses campaigning to make it true.'" Computerworld has a summary of some of the blogosphere's reaction to RMS's position.

jbrodkin writes "IBM has an unconventional take on virtual worlds for business use. Rather than strictly adhering to the laws of physics, IBM is letting its employees hold virtual meetings up in the air and under water. Employees are also being given wacky chores, such as kicking a giant boulder 1,400 kilometers. The virtual world, known as the Metaverse, has been in development for two years. Michael Ackerbauer of IBM says, 'I'd say more people are still finding it a novelty than a business tool. But ... if you build enough tools that they can use, they will come.'" IBM seems to be following a trend of involvement in virtual worlds, which we have previously discussed.