April 3, 2007 - Yesterday, Harmonix owner MTV and publisher EA held a conference call with the press to announce Rock Band. During the Q&A session, we misunderstood Harmonix CEO Alex Rigopulos and thought he stated that the guitar from Guitar Hero II on Xbox 360 would not work with Rock Band.
However, today on the official Rock Band forums, developer Jason Booth pointed out our mistake. Apparently the guitar will work with Rock Band. PlayStation 3 owners will, however, need to purchase a new guitar unless Harmonix releases an adapter.
Thanks to IGN.com for sharing the news with us!