The idea is to accelerate/decelerate slowly over a long period. So yeah, 300kg can do the job (with enough fuel).

"Tuned to particular wavelength..." how is that a natural phenomenon?

As I understand, to generate that cloak you need to create/modify underwater layers by changing salinity or temperature or direction. It all comes down to manipulating HUGE masses of water -- meaning investing HUGE amounts or energy. It's a cool idea but the implementation is in the regions of sci-fi.

So continuing with your logic... It's ridiculous to finance a 800$ bulletproof vest to stop a 20c bullet (that's a much higher price difference). You judge price-efficiency by how much damage the attack can cause if you fail to stop it. NOT by how much money it costs the enemy.

Hmm... 1300 air strikes in 7 days. ~110 dead... in one of the most densely populated areas in the world(!) I guess those Israelies suck at exterminating.

According to a different source all or most sites taken down where private or business owned and the data published is from a "Unity Coalition for Israel" group and user data from some real-estate board. It's quite possible that the truth is somewhere in the middle.

Am I the only one finds the last statement "This is an incredible resource!" depressing?! Is everything always measured by how it can be of use and profit us people? I firmly believe that before long the only organisms left on earth will be the ones humans couldn't find ANY use for -- and the list does not include other humans.

"It is difficult to get a man to understand something, when his salary depends upon his not understanding it!" -- quote from "I, Candidate for Governor" by Upton Sinclair (1935)

Do you really want your smartphone collecting information about you when you're fooling around on your bike? more evidence your for future speeding tickets? I can already see court orders waiting in line for the company's data.

The same sort of subtle or not too subtle shakedown / "protection" / extortion has been around since forever. It just found it's way into a newer platform which makes it even easier to stay anonymous.

Here goes the remains of the rain forests.

Firefox as a platform will never be a major threat to Chrome/IE9 for the single sad reason, Google+MS+Apple have all the money and all the patents and can sue Mozilla's pants off.

Why try to beat US security at their own game? go low tech. it works for el-qaeda. If they used the good old mail services they would have gone unnoticed for another 10 years.