David Chappell of Chappell & Associates has updated a whitepaper that introduces Windows Presentation Framework (WPF). This is a great read if you are new to WPF or if you are simply interested in some of the high level differences between WPF & Winforms, Silverlight & XPAPs and Silverlight & ASP.NET.
From the featured news feed on http://windowsclient.net checkout the whitepaper here: http://windowsclient.net/sitefiles/1000/tarticles/Introducing_WPF_in_NETFramework_3.5_v1.zip
Thanks,
Jamie Wakeam
ISV Technical Advisor
Microsoft Canada