I downloaded this, but haven’t played around with it yet, so I can’t offer any other opinion than I think it’s a great idea. Once I implement it and actually try it out, I’ll post with comprehensive feedback.

Jaxer – The AJAX Server

From Aptana.com:

“Jaxer is the world’s first true Ajax server. HTML, JavaScript, and CSS are native to Jaxer, as are XMLHttpRequests, JSON, DOM scripting, etc. And as a server it offers access to databases, files, and networking, as well as logging, process management, scalability, security, integration APIs, and extensibility.”