The Kissaway Trail - 61
I heard these guys for the first time on the radio last night but already I’ve found a bunch of tracks I like - check out Smother+Evil=Hurt and the awesomely animated La La Song.

Postal Service - Such Great Heights

DragonForce - Through The Fire And Flames
This song also appears on Guitar Hero 3 and looks impressively difficult!

Tom Waits - Hold On

Ratatat - Seventeen Years

Eagles of Death Metal - I Want You So Hard (Boy’s Bad News)

We Are Scientists - Nobody Move, Nobody Get Hurt

Wir Sind Helden - Nur ein Wort
Translation: We Are Heroes - Just a word

Daft Punk - Aerodynamic

Skunk Anansie - Charlie Big Potato
Since one track is never enough you should try the happy song Lately and the sinister song Secretly too.