I'm pretty excited that Mr. Kridner and friends are working on a web-based IDE hosted on the device. I've been working on this kind of self-served programming tool for a while now, and I'm excited to see others joining the effort.

Mine is based around CodeMirror (http://codemirror.net), while they chose Cloud9 (http://c9.io). I actually started using Bespin, which was a precursor to Cloud9, but switched to CodeMirror because it had less kitchen sink included.