The download of the Ajax.NET Professional [1] source code is available at http://www.ajaxpro.info/sourcecode.aspx [2]. Notice, that it is only the latest snapshot of my version to show my comments, and how I did it internal.
If you find any bugs or want to add some code please send the changes to the Ajax.NET Professional Google group at http://groups.google.de/group/ajaxpro [3].