I'll just copy/paste my list from Facebook.
311, AFI, Alice in Chains, Fiona Apple, Audioslave, Beck, Better Than Ezra, Brand New, Busta Rhymes, Cake, Johnny Cash, Coheed and Cambria, Dave Matthews Band, Death Cab For Cutie, The Decemberists, Depeche Mode, Dr. Dre, Everclear, Garbage, Gorillaz, Foo Fighters, Fountains of Wayne, Franz Ferdinand, Green Day (old AND new), Guster, Hot Hot Heat, Incubus, Jay-Z, Jimmy Eat World, Keane, The Killers, Lit, Live, Lostprophets, The Mars Volta, Bob Marley, Alanis Morrisette, Muse, Nas, Nine Inch Nails, Nirvana, No Doubt, The Notorious B.I.G., The Offspring, OutKast, Pearl Jam, A Perfect Circle, The Postal Service, R.E.M., Radiohead, Red Hot Chili Peppers, The Smashing Pumpkins, Snow Patrol, Social Distortion, Soundgarden, Bruce Springsteen (earlier stuff), Sublime, The Strokes, System Of A Down, Talking Heads, They Might Be Giants, The Verve, Weezer (mostly old school), Kanye West, The White Stripes, 90s alternative, showtunes, TV themes, Hungarian folk music, and lots of other random stuff