Bobsled permits free friend-to-friend calling through Facebook . For now, Bobsled is voice only and requires the recipient to also have the app installed. [Updated: 1:20]
The stealth J-20 is said to have made a second succesful test flight, and some analysts speculate it may rival the only other operational jet designed to evade radar, the F-22 Raptor. [Updated: 1:20]
The London School of Economics finds that 43% of 9- to 12-year-olds report having a social networking profile. The study highlights the difficulty in implementing Facebook's  13-year-old age requirement.
After resounding success at crowdsourcing location knowledge in places such as the Indian Institute for Technology, Google  Maps is permitting U.S. users to add the locations of items such as public parking lots, bike paths, and unmarked restaurants. All additions are reviewed and "will appear in Google Maps within minutes." Watch real-time mapping here  (Google Earth plug-in required):
PTSD Coach provides struggling soldiers  with accurate medical information, sources of local support, and individualized coping strategies.
Sources: BBC, The Official Google Blog, Yahoo News, Engadget
[Image: Flickr user brewbooks ]