Question: Do you know any online problem sets or contests that accept solutions in Haskell? I know only [El Judge](http://acm.mipt.ru/twiki/bin/view/ELJudge/WebHome), but unfortunately it has some problems with ghc, so any Haskell problem is rejected with "memory limit" resolution.

Answer: 
[Google Code Jam](http://code.google.com/codejam/)
Did you just miss [ICFP Programming Contest](http://en.wikipedia.org/wiki/ICFP_Programming_Contest)?