Won't replace Emacs for me for a simple reason - even if this editor supported rebinding keyboard shortcuts, the platform - Chrome - won't allow to bind some key combinations, like CTRL+n. It's a failure of the platform, not the editor; web version of Emacs (featured on HN some time ago) is also unusable on this browser.

Does anyone have examples of good use cases for this? I personally can't imagine why it would be more useful than my full IDE, though I'm eager to hear how others might use it.

If I understand correctly, this naturally handles concurrent multiple users the way a normal Google document would?

Looks very cool!

Looks really good. I had high hopes for Bespin, but I haven't heard anything about that in some time, so I suppose I'll start watching this project instead.

I know it's based heavily on GDocs, but my workflow is based around Dropbox. Maybe something could be rigged up there.

What does "Google Drive revision control" mean in this case?

It might be a nice app but it requires permission to perform R/W operations when I'm not using the application. Why do you need those permissions?

You can leverage App Engine's Channel API for some minimal collaboration techniques.

I wonder when they will offer side by side compare with older revisions.