A new version is available free for download at http://ajax.schwarz-interactive.de/download/ajax.zip [1] including a usage guide and a quick start.
If you have problems, questions or new ideas please contact me using the form at this web site. Please do not forget to enter your email address that I can answer direct. If your project is not working feel free to send me sample files.
Updated: I have updated the Ajax.NET Wrapper DLL this evening. Firefox is now working, again.