Chat-o-licious - AJAX + .Net based chat

From the site:

Chat-o-licious is a proof of concept web-based chat application that uses an AJAX based browser client and a bare bones ASP.NET based chat engine.

The goal was to create a seamless chat experience while avoiding some of the pitfals commonly associated with web-based implementations like unsightly page refresh and frames. Each of these challenges are overcome by utilizing asynchronous javascript xml-http requests.