Madcatz makes a Rockband MIDI adapter for all systems

This Madcatz peripheral allows you to use standard MIDI enabled guitars, drums, and keyboards with the Rock Band game.  So if you already have some nice audio gear, you now can save a little coin and purchase this $40 dollar adapter.  The little box has all the controls and buttons you need to navigate and play the game.  When a MIDI instrument is plugged in, the game will recognize it as a "Pro Instrument".  The Wii and PS3 versions are already out, while the 360 version is coming soon.    via: ohgizmo,  madcatz