My friend and I just wrote something today that I hope will become the bedrock of a similar service, but for Perl: Oyster (http://github.com/gatlin/oyster), so named because it contains a Perl.

We tied Redis lists to filehandles, and then redirected STDIN/STDOUT in a local context to the Redis filehandles. Then, we simply eval code. It's a proof of concept awaiting sophistication / configuration.