[url]http://www.direct2drive.com/2/8687/product/Buy-Call-of-Duty:-Modern-Warfare-2-Download%3Cbr%20/%3E[/url]

[B]At Direct2Drive, we believe strongly that when you buy a game from us, you shouldn't be forced to install and run a 3rd party software client to be able to play the game you purchased. Because COD MW 2 requires you, the consumer, to do that, we aren't able to offer the game via Direct2Drive at this time.[/B]

Well, kudos to Direct2Drive for sticking by their principles, and not selling games that force you to use Steam. Unless it's FEAR 2. Or Shadowgrounds Survivor... :D

Edit: Whoops, looks like GP beat me to it.