Gamespot hands on..
http://www.gamespot.com/xbox360/puzzle/rockband2/news.html?sid=6193439Here are the main points of the article:
-confirmed songs (10 of them)
-one character can play every instrument
-ability to create custom setlists in quickplay
-Two new modes
Tour Challenge- Replaces solo tour, nonlinear path, 1-4 players, DLC integration, album specific challenges
Battle of the Bands- unique entry requirements and gameplay modifiers
Instruments- velocity sensitive drum pads, sturdier strum bar
ONLINE BAND WORLD TOUR!
All this and more at the link!