I was delighted to find, when visiting Denmark St in London the other day that there is now a new keyboard shop. Wunjo Guitars now have Wunjo keys, with a selection of vintage and new keyboards. I picked up a QuNexus there and am very impressed. It's not just an incredibly portable two octave keyboard but is surprisingly playable. Each key responds to velocity, pressure and tilt (which typically you would map to pitch bend). Beautifully built - although there are a couple of firmware issues that I have mentioned to Keith McMillen. Firstly if you map pitchbend to tilt the first small movement of the key after you hold it down will jump pitch to the absolute tilt position. This causes pitching issues that are difficult to work around. The second is that the octave switches immediately retrigger current notes in the new octave - they should only affect new notes.
Fortunately in Reaper (I'm afraid I parted company with Sonar some years ago) this is very easy to fix. I've created a JS plugin to resolve these issues and am just testing it before I post it back to the Reaper forums. Amazing technology, these are just simple text files that allow you to create effects for MIDI or audio without any faffing around with programming environments. Kind of like Sonar's CAL but infinitely more powerful.
Anyway, this is a keyboard controller well worth checking out. Amazingly portable, it is only a few millimetres thick and less wide than your average laptop. And surprisingly playable even if you're a seasoned keyboard player. Oh, and the keys light up when you press them. And the LEDs respond to MIDI note events sent to the keyboard. So it makes a terrific set of drum pads as well. Definitely worth checking out, in my opinion.