Here's a demo of my current eigenharp project:
http://www.youtube.com/watch?v=8zkuyYnD5kE
(Apologies to the poor folks in my friends/circles on FB/G+ who are going to get this three times over..)
This is a setup built from scratch in EigenD 2.0.44-experimental, with the keyboard hooked directly to an osc output agent. That goes to an 80 line python script that finds the maximum pressure / pitch bend signal across the keyboard, and then spits out a light pattern over HTTP that goes back into eigenD through the illuminator agent.