group A miike snow,mmj group B vampire weekend, nada surf group C LCD soundsystem, caribou group D the xx, dirty projectors group E Massive attack, girls group F mgmt, she and him group G deadmau5, booka shade group H Band of Horses, Drive-By Truckers
Block party has tons of good local band earlier in the day when there are less people. When it gets to the head liner it is way to crowded. If you are aggressive you can push your way to the front during the act before the headliner.
Last year it was tv on the radio. This year it is miike snow. At first i thought they would be a band with one hit song(animal), but after i listen to the full album i was over joyed about how awesome it was.