While getting more and more emails from developers asking for a open source project I will have a look around in the open source world to find a good license and place where to put the source code. First I have to talk to companies that are already using the ajax.dll in their projects what they think about this.
I will write here on my blog in the next days where you can have a look on the source code.
Update: Yesterday night (German local time) I put the source code on a workspace at http://www.gotdotnet.com/ [1]. Today I noticed that somebody modified source files removing the Copright that was placed in top of the files. I have removed the main files, sorry.