Several folks have asked for this, so here it is.
Works with ASP.NET AJAX RC1.
I tried running with your sample but I hit a error and it asks me to download WPF/E CTP Ver Dec2006, not sure how to fix.
I already had AJAX RC1 with WPF/E CTP Feb 2007 Ver installed on my machine.
When I tried debugging your provided project I hit some "CLSID" which are trying to refer in JScript file which on hitting exception asks me to download CTP for Dec 2006.
How do i changed this cls id? Any solution is appreciated