Starting this Friday, February 17th at 10 CET Mojang will be creating a new game LIVE with all of the money going to charity. With the help of our friends at HumbleBundle.com, we are having a fun game jam weekend! By donating, you will be given the game created in the 60 hours (and maybe some other fun things too).
http://www.mojang.com/2012/02/15/humble-bundle-mojam/
Sounds a cool idea to me