Just in case there weren't enough ways to bug your friends online, Harmonix revealed "Rock Band World" this morning, a new social app for Facebook. The app integrates with both Rock Band 3 and Rock Band Blitz, allowing players to challenge their friends, compare scores, shop for music, and accomplish social goals. Accomplishing said goals can earn players in-game coins for Rock Band Blitz, which can then be used to purchase power-ups.
The app is now available on Facebook. Rock Band Blitz arrives on PSN August 28 and on XBLA August 29.