I am a member of Deviant Art. As of late, I have actually been looking at the contests that are offered there.
Most recently there is this contest that I will be entering sponsored by Eve Online.
I entered a contest last month for Resident Evil (which can be viewed here - though I must warn it is a bit gory). Seems I didn't win, but these are great practice for me to do things that are not my normal subjects.
Always great to widen one's horizons... and put yourself in the running for prizes. ;)