Looks cool, but for those unfamiliar with Sage, it has a similar notebook feature built-in. Codenode looks promising, but Sage's notebook is currently more mature. You can try the Sage notebook out at http://sagenb.org (needs registration but it's a quick process). (use shift+enter to evaluate what's in the current box)

Hi, I'm one of the main developers of Codenode, and I wanted to agree that the Sage notebook is a bit more mature at this time.

In fact, I was one of the original creators of the Sage notebook (along with William Stein, Tom Boothby, and others).

We started Codenode with the hope of creating an even more generalized and robust online code notebook.

Nice. I think there's definitely room for a notebook like this outside of just Sage. The real time collaboration you mentioned sounds like a killer feature, too.

this looks pretty damn cool - thanks for posting it. i've been meaning to switch to python for numerical work, this is finally going to push me over.

Not seeing the benefit over emacs python mode, myself.

Codenode is like "Google Docs" for programming.

The benefits are more the ability to "code anywhere", to not have to install anything (think Windows here), to have the backend server contain lots of pre-installed packages, and to do real-time code writing collaboration with others.

The real-time collaboration is a work in progress. For more information, see here: http://github.com/clemesha/hotdot

Thanks, that does seem highly useful.

I don't understand the black bars. Do they indicate a running script?

They indicate a region where a new "Cell" can be inserted.