Alabama 3 has been sitting in my car for a good while now
Awesome band. Not only are they responsible for The Sopranos' theme, but "Ain't Goin' To Goa" is the shit.
Chemical Brothers, Massive Attack, The Killers, Portishead, Radiohead, Porcupine Tree
:] My fav bands.... 
Well done with Chems and Portishead. Much respect.
Rx Bandits and Cake are at my top
Cake is the fucking jam.
Muse is mine.
Muse is like sci-fi rock the likes of which I haven't heard since I first started listening to Rush.
A somewhat underground band called the Toadies. maybe you've heard them, if you haven't I highly recommend checking them out.
"Possum Kingdom" used to be awesome until everyone played the fucking song out 48 times over. I hate that song now, and I always thought "Away" was a better showcase of their musical taste anyway.
Yeah sonic youth is great. Everr listen to the Pixies?
Both are bands well worth listening to.
I got an IPod Touch for my birthday and have been using it for everything. The stuff I listen to the most changes daily, but groups that are constantly in rotation are:
Beastie Boys (every album)
The Chemical Brothers (every album)
Daft Punk (every album)
Del The Funkee Homosapien (especially the Deltron 3030 album, but yes, I have every album)
311 (starting to notice the trend? - every album)
Beck (again, every album)
Zebrahead (every album)
Bomb Factory (every album)
But most of all, I always run back to Daft Punk. I don't know why.