ASP.NET AJAX 4.0 CodePlex Preview 1

A prototype of the future ASP.NET AJAX 4.0 became available (for testing purposes) about which was written here .

www.codeplex.com/aspnet/Release/ProjectReleases.aspx?ReleaseId=15511

Of the interesting things in this release are:
* Client-side template rendering
* Declarative instantiation of behaviors and controls
* DataView control
* Markup extensions
* Bindings
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Promised support for the following browsers:
* Internet Explorer 7.0.5730
* Firefox 2.0.0.16 and 3.0
* Safari 3.1.2
* Opera 9.51

PS:
in fact, the archive contains two js-scripts (release and debug versions of MicrosoftAjaxTemplates.js), for which you need to include them in the page code.
PPS:
The first example with new features can already be seen here.