Because there are a lot of developers frustrated by the license of the BorgWorX Ajax.NET source code I will help  you how to use the source code in your environment. If you send me your email and mailing address including company name you will get a license to use the Ajax.NET source code in your projects. The only thing you have to do is: send bugfixes or new features (C# source code) to one of the authors email address or using SVN (account needed first). You are not allowed to create a standalone AJAX library with the Ajax.NET source code. Build your own controls using the powerful Ajax.NET library.
At the BorgWorx Wiki  you will find the Developer License  section which will be available as full license doc in the next days.