Rubix, I Just Threw Out The Love Of My Dreams is technically a Rentals song. The Rentals are a band close with Weezer though, so they get sometimes mixed up on Napster. (Another time Ive seen this phenomenon is with The Love Im Searching For, which is a Rentals song, usually listed on Napster/Morpheus, what have you, as a weezer song.)
But Ill add a few:
Jets To Brazil: Morning New Disease
Jimmy Eat World: Sweetness
Juliana Theory: Into the dark
The Ataris: The Last Song I Will Ever Write About A Girl
New Found Glory: Boy Crazy
Weezer: Island In The Sun
Beasty Boys: Brass Monkey
Fenix TX: Rooster Song
Reggie and the Full Effect: Dwarf Invasion
Saves The Day: Rocks Tonic Juice Magic
Remy Zero: Tremenos (here come the shakes)
Velocity Girl: I Cant Stop Smiling
Toad The Wet Sprocket: I Will Not Take These Things For Granted
Just a few songs to check out

A wide smattering of genres to fit any taste