I have developed a game idea for this complicated theme: It will be a multiplayer ASCII (trunbased? – do you think thats fun?) topdown shooter
Thanks to the IRC #ludumdare members who motivate you if you have no idea what to do and where to get started.
Graph of the #ludumdare activity and user relations:
http://dl.dropbox.com/u/84142058/ludumdare.svg