Microsoft paid $240 million for less than 2 percent of Facebook, but Google's getting a peak behind the curtain for free. According to reports, there's a vulnerability in the Facebook application Compare People, made by a company called Chainn. The app allows a search engine such as Google to rifle through the information of any users who have the app installed on their profile. That's about 10 million Facebook members, according to numbers from AllFacebook. What kind of user information is available?