Clarifying its stance on rhythm game compatibility issues, Microsoft's Gamerscore Blog announced today that all the instruments for Rock Band 2, Guitar Hero: World Tour and Rock Revolution will be "cross-compatible" on Xbox 360.

Sony announced yesterday that PlayStation 3 would feature full cross-compatibility among the three games as well. Guess that leaves only Nintendo to make it official.

Update: The Instrument Compatibility Matrix has been updated
[Thanks, Mike]

This article was originally published on Joystiq.