If you like Nomic, check out Nomyx[1] which is a computer version of the game. Rules are specified and submitted in a domain-specific language called Nomyx, embedded in Haskell.

I don't know if the current game is active, but it's certainly something that would be fun to try with a bunch of friends.

EDIT: forgot link (thanks an_ko)

[1]: http://www.nomyx.net/