_Please_ don't make more links to private betas, wait until they go public.
If any fellow HN readers want an invite, you can send me a direct message on twitter or wherever.
Right now we support open source Ruby projects, so if you fit that group let us know.
I got really excited when I saw this. Then I noticed it was in private beta. Then I noticed it was Rails-only. Then I closed the window and cried :'(
We support Ruby btw, not just Rails. We'd love to expand to more languages, the big question is which ones do we focus on next due to the time+cost it takes.
I'm strictly a Python guy myself. If it were me, I'd try to reach out to various programming communities and see what the demand is for different languages. Personally, I will never have a use for anything that requires me to use Ruby, but I'm just one guy; maybe the Ruby/Rails communities have the biggest desire for this type of service. I am switching over to GitHub, though ;)