free hosting for Rails demos?

I'm working on some Rails projects that I plan to release
as Open Source. In order to show them off, get feedback,
and such, I need a web-accessible site that can host them.

If you know of such a resource, either formal or informal,
please help me find it. Alternatively, if you run a Rails-
friendly ISP, please consider setting up such a service for
the community!

-r