This is pretty cool! I know it's new and all, so maybe I'm getting ahead of myself when saying that it would be nice if it supported other languages aside from Python. I know that iPython supports Ruby, Perl and Javascript, and there's a plugin for Julia, but it doesn't appear to be supported right now. I am still on the waiting list to play around with this however.
Also, integration with Google docs for the purposes of data processing and data handling would be incredible! But that's just me dreaming.