I'm pretty sure the preview version of Groove will do everything we would need it to do, without any sort of purchase. It allows for a single group workspace, which is all we really need. I already have the preview version installed on one of my machines for collaboration with my RtcW clan, and we've never had any problems. I could just as easily install it on a seperate PC for collaboration with our game dev group. I'll double check on it if anyone is interested, but I'm pretty sure there would be no cost involved.