Watching the Musikmesse videos, something caught my eye - the visualiser graphics that seem to be driven by the Eigenharp. I've seen them once before on a video by Hexstatic. Do we know if the software is theirs or eigenlabs' ?
I'm very interested in these real time visual effects. Running it direct from MIDI means the visuals match the music much more directly than the audio visualisers you see in media players that just run off the sound energy level and fourier plot. I wrote a dissertation at Uni in which I implemented a system that accepts MIDI and outputs OpenGL, trying to do tempo and key detection on the way through. I still have that lying around and was intending to port it to the mac and wire it up to the Alpha, but if there's something out there that will do this for me I might reconsider. Of course if it's costly I might stick to my home brew version...!
On a similar note, I'm a big fan of the guys at www.animusic.com if anyone else has heard of this. Their visuals are ray traced offline, but it means you can have effects starting before the note sounds, so they have video with a circular vibraphone, played by hitting the notes with ball bearings that are fired out of a pipe in the middle... great to watch.