For general feedback about the game.Steam Support
Visit the support site for any issues you may be having with the game or Steam.
Also, a quick note: The fine fellows at Gang Garrison have just released version 2.1 on their webpage. We played a bunch of 2.0, and can't wait to spend some time with the new update. There's a ton of new additions, from Control Point mode to Killcams to Manviches, so even if you've played it before, you should head over there and check it out!