it's nice to see something that could be left as a side project evolving into a functional and hopefully successful product. Good luck! Did you switch programming languages in the process?
I didn't switch server-side languages, but I started from scratch 2 years later, in the beginning of 2008. I had developed my own Flash based AJAX system I called AFLJAX before then, and was using ASP.net 2.0, then started a new project with ASP.net 3.5, Microsoft AJAX and update panels.