Here's a story that we want to be cautious in posting as it could be used to nefarious effect. But, we also felt it was important to inform you guys so that you can be armed with enough knowledge to watch out for this kind of thing. Apparently, there is an app called Faceniff that allows you to login to another person's Twitter, Facebook and YouTube accounts if they login on a shared WiFi network without SSL encryption. This is a serious security issue that people need to be aware of. We aren't going to post any descriptions of how to do it, or links to the app, obviously. One of the easiest ways to avoid this being a problem is to switch to an HTTPS connection on the web services that support it, like Twitter and Facebook. Also, it's not a bad idea to try and be aware of who is around you while you are on a public WiFi. The use of this app is probably illegal in most countries.
Source: Android.net via PhanDroid