For general feedback about the game.Steam Support
Visit the support site for any issues you may be having with the game or Steam.
If you haven't seen it yet, check out the spiffy TF2 video made by AyesDyef over here. And then check out how spot on he really is here.
It was his birthday earlier this month, so if you see him out on Goldrush, wish him a happy birthday before you shoot him!