I just had a hand at Rockband. All I can say is: DUUUUDE!

Forget Guitar Hero, Rockband's the best music game ever (GH fans will stone me).

Some Stats:
Most Addictive Song: Welcome Home (BEST. SONG. EVER.)
WTF Song: Maps on Vocals (Lyrics are a drag)
Hardest Song (so far): Highway Star on Guitar
Best Song on Vocals: I'm So Sick (Just because it's by Flyleaf :D )
Easiest Song on Vocals: Sabotage (It's mainly rapping--then again, Beastie Boys stuff is)
Said-to-be Hardest Song Ever: Run For The Hills
Favorite Song: Too many to pick :p
Most Depressing Song: Creep 

Yeah, I'm officially addicted.