Monday Night Combat is now available on Steam. To ensure that you buy the damn thing, Valve and Uber Entertainment are injecting Monday Night Combat with Team Fortress 2 stuff and Team Fortress 2 with Monday Night Combat stuff.
Here's the deal. If you buy a Monday Night Combat on Steam before 10 a.m. PST, February 1st, 2011, you'll get all manner of Team Fortress 2 hat, mask, bandoleer, eye patch and dispenser for your MNC players. You'll also get a handful of Monday Night Combat-themed hats, socks and personal items for TF2. Everybody wins.
I think you also get Penny Arcade's Fruit Fucker, aka Juicebot, in Monday Night Combat, but I'm not quite sure why. But, hey, free thing! More details about the MNC launch at the developer's official site.
Monday Night Combat on Steam [Steampowered]