My friend Simone has created an interesting survey focused on .NET developers and Ajax. It's a more focused response to this survey on the Ajaxian blog. As of 2 AM (in Italy), there have been 415 responses:
- ASP.NET Ajax: 80%
- AJAX Control Toolkit: 17%
- JQuery: 13%
- raw Ajax: 12%
If you are a .NET developer and are working with Ajax be sure to take the survey.