Collaborative editing with Mozilla/Firefox

I have put my little app online. Basically it is a web-based collaborative editor that runs on any XUL-capable browser. I had tested it under Mozilla, Firefox, K-Meleom and even Netscape Browser... I don't have a Mac or Liunx, so I'm not sure if it could look ok under these platforms.

Please take a look if you are interested (and happen to use a Gecko browser). ;-)