Those of you Rock Band fans looking for the 3rd installment might be disappointed in 2009. According to Kotaku:
Harmonix CEO Alex Rigopulos says that Rock Band may be taking the year off in 2009, with the developer focusing its efforts on the Beatles game it announced in October. Instead, expect more music.
Rigopulos said at the Billboard Digital Music Live keynote at CES that the Harmonix team will be directing its “creative energy” to the still-untitled Beatles video game project and expanding the catalog of tracks available for Rock Band and Rock Band 2. The Rock Band music library crossed the 500 song mark.
Source: Kotaku