Microsoft released ASP.NET AJAX

ASP.NET AJAX is a free framework for quickly creating a new generation of more efficient, more interactive and highly-personalized Web experiences that work across all the most popular browsers.

With ASP.NET AJAX, you can:

• Create next-generation interfaces with reusable AJAX components.
• Enhance existing Web pages using powerful AJAX controls with support for all modern browsers.
• Continue using Visual Studio 2005 to take your ASP.NET 2.0 sites to the next level.
• Access remote services and data directly from the browser without writing a ton of complicated script.
• Enjoy the benefits of a free framework with technical support provided by Microsoft.

You can download ASP.NET AJAX here: http://ajax.asp.net/downloads/default.aspx?tabid=47

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