I am at a internal Microsoft training event all this week in Seattle and I just got out of a WPF/E (Windows Presentation Foundation Everywhere) talk and all I can say is wow! For as much as I don't like thin clients WPF/E applications will be incredibly rich. you can check out a lot of different examples on link to channel9 below.

http://channel9.msdn.com/go/wpfe/quickstarts/

MSDN WFP/E center: http://msdn2.microsoft.com/en-us/asp.net/bb187358.aspx

Get the current CTP at http://www.microsoft.com/downloads/details.aspx?FamilyId=E63992D3-CCF5-40B9-B98A-D16BCA57467C&displaylang=en