Myself and Robin Foster have sporadically recorded music together over the past few years (calling ourselves SANDWICH), but we have recently started an experiment that Robin devised quite a while ago, and that we have finally started putting into practice. Essentially, it is improvisation that is carried out asynchronously, whereby one or other of us (we are alternating roles at the moment) will send the other a piece of music. The recipient of the music then decides on an instrument/technique/max patch/whatever to use, and without listening to it first, simply presses record, and improvises along. It is early days, but it's a really interesting idea, and I'm quite pleased with the results so far.
Here are a couple of examples:
LANDELOTTIE by SANDWICH by robinfoster
Moon woman by SANDWICH by robinfoster
Do Check out the rest of Robin's stuff on his Soundcloud site:
http://soundcloud.com/robinfoster
as well as his personal site:
http://www.robinfoster.net