StudioLogic showed their new MIXFACE - a USB MIDI controller with Faders, knobs and transport control. Its more than just this though as you can set up 4 discreet zones to any incoming MIDI keyboard - it has a Host Port so you can plug directly in, additionally theres a USB to computer, plus Bluetooth MIDI connection.
Each zone can have is own key range, program change and MIDI output routing option, shame there was no MIDI ports on it too as this could easily be the brain of your MIDI setup, sending out patch changes, zone limits, controller mappings each stored in on board memory.
Gonna be coming out in a couple of months at around 199 Euros.
The philosophy of designing organismic instruments