I also like
ExtremeMusic.com. One of their songs that I like,
Dun N Dusted, I immediately recognized when it was featured in a previous awards thing at GameTrailers.
I initially found ExtremeMusic.com after a lengthy search for the tune in one of Bulletproof Monk's trailers (you know, that Chow Yun-Fat and Sean William Scott movie),
Psycho Slam. ExtremeMusic.com has changed the design of their page and I haven't been there lately (and I can't right now because it's blocked at work), but at one time (if it's not still there), you could search for tunes by mood, which was/is neat. All of this "production music", all these soundtrackesque tunes, are really handy for doing video montages (like I do now and then for special occasions) especially when you want something that fits a certain mood, and don't want something too familiar, and/or when you don't want words.
It's always interesting when a search for something brings you to a lot more.