After the December 2006 CTP, we will also enable a managed code programming model using a subset of full CLR that will enhance the programmability side of the browsers to enable more performant and more scalable Web applications.
The quote is from the WPF/E Architecture Overview, which is a great place to start if you want to know what’s in WPF/E.
See also this interview with Forest Key from back in March, if you have not read it already.
I’ve downloaded but not tried the samples yet.
Postscript: Mike Harsh has some more info and a sample WPF/E video on his blog. The humour in the video is somehow typically Microsoft…