In reply to:
Mxy, I've read that Beck had a hand in Scott Pilgrim's music, and that's a good enough reason for me to check it out. I kept tolerably up-to-date with Beck's up to and including The Information, and have enjoyed his stuff. I'm slightly suspicious of the 'geek chic' surrounding the movie itself, though. And I've been pretty crap at keeping tabs on Trent Reznor.
I stopped keeping up with both of them years ago; in Beck's case, I suspect finding out he's a scientologist had something to do with it, even though as far as I know he keeps that bullshit out of his music (unless I'm missing the subliminal references to Lord Xenu). Trent has always been cool but, you know, life goes on and sometimes having a sandwich sounds more appealing than listening to his new album.
I arrived at these albums the conventional way: watching the movies and liking the background music enough to seek more of it. I had a preconceived idea of what a Trent Reznor soundtrack might sound like when I watch The Social Network, and what I heard completely subverted my expectations. It's a very good record. I've also found that it's ideal for walking someplace in a hurry.