Joined on 12/22/07
Great question. I haven't either. Me and Retro worked on a collab, but it wasn't really thought out well. He basically just took one of my songs I gave up on and did stuff with it, and it never got finished. At least not yet.
There are plenty of file transfer sites that we could pass around an flp file on. I'll talk to Retro (and maybe my friend Joey, who's getting into music making again) and we'll try to find some way to put our heads together to make something amazing.