According to this Gaming Today piece, EA’s shipped Rock Band 2 in America.
The sequel releases on Sunday in the US. From the announcement:
Rock Band 2 and Harmonix are raising the bar in the music game category again with an incredible music setlist, innovative online features, and new authentic instruments. With over 300 songs available on disc and via weekly downloads, no other music game can compete with the Rock Band 2 music catalog,” stated Bob Picunko, Vice President of Electronic Games and Interactive Products, MTV. Mark your calendar, call your band mates, and get set for the best Rock Band party ever on Sunday, September 14th.
There’s no fixed date for the game in Europe as yet. Bear in mind this only pertains to the 360 version, as well.
More through the link.