Yeah, but everyone I know is getting it for the 360 - so PC loses out there. I don't like playing with bearded strangers as they use TeamSpeak into their expensive Logitech headsets with the clean hum of their $3,000 PC in the background!
I mean, although I'm getting The Orange Box for the 360, I'll eventually nab TF2 for the PC. The 360 community will eventually die out in 24 months or so, but TF2 will hopefully have a TFC-type shelf life on PC.