Bespin, or how to rethink code editors

Cloud apps are starting to be everywhere these days.
Mozilla is realeasing Bespin an online code editor based only on HTML 5 technologies (mainly Javascript).
You can play with it here or grab the code to see how it is done.

I think that this kind of software is very interesting.  I played with it a little bit and I think that it is well done and includes some very nice features (it is pretty fast, scales well etc...).

But still, from a security point of view, I remain pessimistic about the privacy issue. The files are stored and modified in the cloud.