There was a tryruby repository at Github, but I don't know if it was all that was needed to run it.
One of the things that bother me more is the fact that he also pulled the plug on all the mailing list of his projects, which would have been the right place to discuss what to do with the code.
For what it's worth, this impacts me enough that I've looked, and I couldn't find it. If I had, I likely would have already been fast at work trying to put up a replacement, if only to have something to link to the people who are sure to ask me what happened to it.
My wife actually noticed yesterday that it was gone before I got around to reading all the comments on HN about Why's departure. I eventually told her that he was basically dead. Her response? "How am I going to learn Ruby now?"
I of course have installed a local interpreter, but she really liked the lessons.
One of the things that bother me more is the fact that he also pulled the plug on all the mailing list of his projects, which would have been the right place to discuss what to do with the code.