Alex,
BRING IT ON! The last contest was one of the best programming fun I've had in a long time. Last year I was just a finalist. This year I wanna win, dammit! :D I still think I got a bum rap with those Coverity Prevent results.
Regarding language, I would suggest that you create a contest that can be written in any of the major languages, i.e. C++, C# (or any .NET flavor), Java, Ruby, Python.
Regarding the contest itself, I think the previous contest was done properly; the target program should be simple (like, say, a Paint or Minesweeper replacement, or a simple Google Gadget), the software should pass a very limited set of integration tests, and so forth, with the same original goal, i.e. "working" software that's just friggin' insane.
Oh, and keep up the good work. Survey Taker #2883 is insane.
Agile Team-Oriented Waterfall-Centric Cowboy Coder.