Sort of reminds me of the iPython notebook plus some of the ideas from that recent pensive talk + light table ideas. Jython + Graphviz is right up my personal alley. I will have to check it out, but curious about the license.
Reminds me of DrRacket: <a href="http://docs.racket-lang.org/quick/" rel="nofollow">http://docs.racket-lang.org/quick/</a><p>I think it allows you to drop in resources and manipulate them as well.