They look cool. http://www.thinkgeek.com/electronics/musical-instruments/af36/

Shame it's not one device with three fronts you can interchange. :(

nanoKEY

Keyboard: 25-key with velocity and 4 velocity curves
CC MODE button
Octave Shift up/down buttons
Pitch up/down buttons
Modulation button
Dimensions: 320(W) x 83(D) x 14(H) mm/ 12.60”(W) x 3.27”(D) x 0.55”(H)
Includes free download for Korg M1 Le Synthesizer software and Korg's Kontrol Editor software
nanoPAD

12 trigger pads with velocity and 4 velocity curves
X-Y pad
ROLL button
FLAM button
HOLD button
4 SCENE buttons (Allows 4 different MIDI configurations to be recalled instantly)
Dimensions: 320(W) x 82(D) x 16.5(H) mm/ 12.60”(W) x 3.23”(D) x 00.65”(H)
Includes $50 off coupon for Ableton Live software and free download of Korg's Kontrol Editor software
nanoKONTROL

9 knobs
9 sliders
18 buttons
Transport buttons: REW/PLAY/FF/LOOP/STOP/REC
4 SCENE buttons (Allows 4 different MIDI configurations to be recalled instantly)
Dimensions: 320(W) x 82(D) x 29.5(H) mm/ 12.60”(W) x 3.23”(D) x 1.16”(H)
Includes free download for EZDrummer 1.14 software and Korg's Kontrol Editor software
PC Requirements

Mac OS X 10.3.9, or Mac OS X 10.4.7 or later
Microsoft Windows XP SP2 or later, or Microsoft Windows Vista SP1
Available USB Port