I had built an RoR 2.x version based PTO tool to learn RoR (a copy of our company's HTML & JS based tool) but never got around to releasing it. I was going to upload it to heroku.com but was waiting to port it to v3.x If you want I can upload it to github and you can take it from there.

I would like to add the from what I understood, BK clients are not clients per-se but more like peers and BK server handling all these peers. Now if one of these peers muck around then it might destroy the whole system which is what Larry was afraid of. Understand that P2P technology is itself pretty new and implementing a distributed SCM using something like this is pioneering for which I will credit Larry and that is what Linus was also doing.