Just when I think we've tapped out all possible open-source business opportunities, I hear of another open-source start-up. Or several.
This past week I've heard of a few new ones, or of others that have been around for a while but have yet to take venture money. Reductive Labs (puppet project), Cilk Arts, RiverMuse, and Watircraft are a few that I can mention publicly, but there are several more that are still in stealth. In two cases, a business hasn't been formed but some very interesting ideas are being kicked around.