Steam is the future, and stop complaining about installing the program for this game.
I bet some of the people complaining about Steam are the same sort of people who defend Starforce's cancerous protection. I'd rather use Steam than have to have system damaging drivers installed so I can play a game. (And I am not quoting anecdotal evidence. I had my own system damaged by Starforce.)
Just loaded up Steam and saw this on there. "$9 for pre-order! WHERE IS MY CREDIT CARD!!!!" Pre-ordered, preloading as I write this. The Orange Box soundtrack is an added bonus.
And to all those people whining about Steam, all I have to say is HAHAHA! As xNinja said, it's the future. Steam games are very hard to pirate (not impossible. No protection is 100%). Given the choice between Steam, or Securom (which is getting dangerously close to Starforce territory these days), Safedisc, Starforce etc... I'll take Steam any day, and any sensible person who values their computer would. If you disagree, then you've clearly never bought a title that you couldn't play due to the copy protection, nor could you return it for a refund, because, in the ultimate "f*** you" from the industry, you may have pirated it.
Ecstatic to see this on Steam. Ecstatic at the price. Roll on the 15th!