sneakerpimps kind of fall into the category of trip hop. kind of. there's a ton of bands like this, and I love them all, except I'm at work and my mind is rotting and I can't think of them right now
but I'll check at home later and update the post for you..
in the meantime, check out
www.audioscrobbler.com ... it's a website that logs what you play in through your music player (itunes, winamp, etc), builds a record, and then suggests other music/people to you. ... or..
www.allmusic.com also offers suggestions based on artists.
..ps... propellerheads are good, like the sneakerpimps.