Hello,
I would like to start a thread about a new open-source MIDI performance software that makes it easier to improvise to (non-modal) chord progressions. Basically it lets you play over jazz changes (for example) by remapping the white keys to the appropriate scales in real time, though there's much more to it than that. Also it's not limited only to keyboards, it works with any MIDI instruments and supports ensembles. Assuming there's interest, would "Improvisation" be the most appropriate group do you think, or would "Music Theory" be better? It's a free project and was demoed recently at the NIME conference.