Amazon has The Beatles: Rock Band Special Value Edition for only $99.99 shipped (Xbox 360, PS3, and Wii), originally priced at $159.99. This bundle “includes a rock band guitar, rock band drum kit, microphone, guitar strap and The Beatles: Rock Band software.” Product page.
The Beatles software is compatible with all Rock Band and most Guitar Hero and other instrument controllers, as well as third party microphones including SingStar and Lips.
[via Amazon]