A few years ago, my wife and I both worked for HumaNature Studios, on a very creative and unique project. It eventually evolved and turned into this great Facebook app, Deko-Deko Mail.
By using Deko-Deko Mail on Facebook, you'll be able to type a status update, and your text will highlight, with suitable animations that you can choose for the post. It has a huge database of short and quirky animations, and keywords tagged to each animation. You can also post a short animation and message to a friend's wall, pick an avatar, a pet, earn and give keys to your friends, lots of fun thing to play with. Deko-Deko Mail is still in Beta, but is already great fun and available for free! So check out Deko-Deko Mail!