Website:
http://lpc.opengameart.org/Liberated Pixel Cup is a two-part competition: make a bunch of awesome free culture licensed artwork, and then program a bunch of free software games that use it.
First part of that competition (June 1st thru June 30th) is for artists who will have to do art in such style:
Second part will be for devs (June 1st thru June 30th), who will use art from part one to do their games.
Maybe anyone would like to do graphical roguelike?
Maybe even you could organize 1MLPCRL challenge?