Below are a list of resources which are relevant for attendees of the UK Technical Roadshow running across the UK over the next couple of months.

Websites

.NET Framework 3 Community - WPF
MSDN Developer Centre - WPF 
What is XAML?
MSDN Developer Centre - "WPF/E" 
Channel9 "WPF/E" playground
MSDN Forums - WPF Designer 'Cider'
Expression Site

 Blogs

The WPF Blog (also covers "WPF/E")
Joe Stegman - "WPF/E" related blog
Mike Harsh - "WPF/E" related blog

Downloads

"WPF/E" related downloads (including CTPs)
Expression Blend Beta 2
Expression Design Beta 1

Videos

Expression Blend Videos
"WPF/E" Screencast 1, Screencast 2 and Screencast 3