Over 20+ hours of free WPF training videos!
With all of the Silverlight Training resources I posted recently it is now time for some WPF love. =)

Be sure to check out the WPF Bootcamp at Mix University.
With over 20 hours of hands on labs, customer examples, and a plethora of topics it will take you through WPF inside and out from start to finish. Here is just a sample:
Keynote: Windows Presentation Foundation
Ian Ellison-Taylor
A Lap Around Windows Presentation Foundation
Rob Relyea
A Lap Around Microsoft Expression Blend
Pete Faraday
Building WPF Applications Part I
Ian Griffiths
Building WPF Applications Part II
Ian Griffiths
LAB: Building WPF Applications
LAB: Building WPF XAML Browser Applications
LAB: Interactive Fabrikam Catalog in Blend
Controls, Styles and Templates
Kevin Moore
LAB: Creating a Button with Expression Blend and Design
LAB: Creating a Glass Button in Blend
Data Binding with WPF
Beatriz de Oliveira Costa
WPF Partner Showcase
Tim Sneath
Documents, Text and the Reading Experience
Kevin Gjerstad
LAB: Using Data Binding in WPF
LAB: Reading Experience
Windows Forms Interoperability
Scott Morrison
Visual Studio Orcas Enhancements for WPF
Mark Wilson-Thomas, Mark Boulter
Grab all the content here today!

Also don't forgot about WindowsClient.NET. There is entire learning section around WPF filled with short 15-20 minute digestible videos around various WPF topics.
Check it out here!