xbeefsupreme writes with news that Harmonix has officially demonstrated Rock Band 3's 25-key MIDI keyboard. From USA Today:
"During the game, green, red, blue, yellow or orange keys flow on a 'stream' representing the notes to be played on five corresponding keyboard keys. In a new authentic Pro mode meant to help players segue to actual instruments, all 25 keys are used; the streams shifts left and right to cover the correct keys. The keyboard also works as a MIDI keyboard that can be connected to a computer. 'This is a real instrument and a real device,' says senior designer Sylvain Dubrofsky."
The game will also support more advanced "real" guitar controllers, which have six actual strings you can strum.

http://games.slashdot.org/story/10/0...-MIDI-Keyboard