I've just started hosting stuff specifically for renderosity free download. The issue isn't really storage space, that's dirt cheap, it's the bandwidth. I'll be ready to go "commercial" in a week or two once a few more details are worked out (need automate and test a bit more.) If you're interested, shoot me a note at john@geekantics.net. If you've got an idea about how much bandwidth you'll need, include that also. Good luck!