If you are Facebook obsessed and own an Android phone, then you might want to consider building your own LikeBelt. The LikeBelt was designed by Deeplocal as a way to let you update your Facebook using a simple pelvic thrust.
The LikeBelt connects to your Android smartphone and uses Near Field Communication (NFC) to let you check into places, add friends and like things. The range of the LikeBelt is small, meaning that you need to be sure that the person your adding as a friend is a real good acquaintance.
Deeplocal's design seems to be nothing more than a design study at the moment, but the concept is interesting nonetheless. The design of the belt is open source, so you could build one if yourself if you really wanted to. Just make sure you ask strangers before trying to add them.