web based ide for ruby on rails?

Question

Does a web based IDE exist for ruby on rails development?

Answer 1

The only one I know of is Heroku.

Answer 2

3 years later : yes, it exists : Nitrous.io (disclaimer : copy/paste the link and remove the ref part if you don't want to help me getting early access )

You can find a short presentation video on Youtube

Edit: it's now called Nitrous.io and it's out of private beta since 26/07/13

Answer 3

try https://koding.com/

Awesome UI with cool feature :)