The soundtrack included with the 360 limited edition doesn't have all the music in the game on it, which I found a little disappointing since the music is used so amazing well. My point is that if they couldn't get it for that release I think it's completely out of the question for a download version of the game.
Well the PC retail and Steam versions of Alan Wake do include a soundtrack; however none of the soundtracks included with any version of the game are complete. http://alanwake.wikia.com/wiki/Alan_Wake_Soundtrack
Still, at least all of the music is available at retail etc. & it's possible to manually compile a complete version of soundtrack if desired.
I makes me wish Alan Wake had ended up with Rockstar instead since they seem to be far better at releasing proper complete soundtracks.
Ugh no, that would have been terrible. If Rockstar (Take-Two) were publishing the game then it would likely never have been released here at all and it would have been much more expensive at release... and they'd probably charge extra for the DLC too :P In fact if any publisher had been involved (even those already signed with GOG) I doubt we'd be seeing it here now, so soon after its debut on PC. Not to mention the general aversion that publishers have to removing Steam from Steamworks games.
Alan Wake was developed by (and the IP belongs to) Remedy, they self-financed the PC version and self-published it digitally, so in a way it's an 'indie' title :P Because of this they have a lot more freedom with their game and the decisions about DRM and where to release it were entirely up to them (also they get more money from sales of it as there's no publisher to take a cut). It would be nice if more developers did this IMO.