So you're all about the newest thing in the Facebook universe, right? You want to get in on all the newest software in the social networking globosphere as fast as possible, correct? You're in luck - we're got news for you. This is Facebook Say Thanks. It's a system in which you'll use Facebook to send a video to your best friend, thanking them for whatever you need to thank them for. Thank them for the Say Thanks video they just sent you, if you really want.