Essential Information
http://www.netfx3.com/
http://weblogs.asp.net/scottgu/
Getting Started with WPF
Download the SDK
http://blogs.msdn.com/wpfsdk/default.aspx

Suggested Learning
02/13/07 - Windows Presentation Foundation
https://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032316314&EventCategory=4&culture=en-CA&CountryCode=CA

02/20/07 - Windows Communication Foundation
https://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032316316&EventCategory=4&culture=en-CA&CountryCode=CA

02/27/07 - Windows Workflow Foundation
https://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032316318&EventCategory=4&culture=en-CA&CountryCode=CA

03/06/07 - Windows CardSpace
https://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032316320&EventCategory=4&culture=en-CA&CountryCode=CA

http://www.microsoft.com/events/series/default.mspx
http://www.microsoft.com/events/series/msdnnetframework3.aspx?tab=webcasts
Virtual Labs Home: .NET Framework 3.0
http://www.netfxguide.com/guide/_net_framework_3_0.aspx
http://channel9.msdn.com/wiki/default.aspx/WPF.LearningWPF
MSDN Library
netfx3.com
Samples on MSDN
Samples that come with Expression Blend

Tools
Michael Swanson's WPF Tools List
http://www.microsoft.com/products/expression/en/default.mspx
http://www.mobiform.com/eng/home.html

Code/Controls
http://wpf.netfx3.com/files/folders/controls/entry5875.aspx Kevin's Bag-O-Tricks - RC1

Videos
http://blogs.msdn.com/tommer/archive/2007/02/03/video-of-scott-guthrie-s-newest-presentation-first-look-at-visual-studio-orcas.aspx
http://www.netfxguide.com/guide/_net_framework_3_0.aspx

Blogs
http://blogs.msdn.com/saurabh/
http://blogs.msdn.com/mikhailarkhipov/
http://blogs.msdn.com/karstenj/
http://blogs.msdn.com/okoboji/
http://blogs.msdn.com/llobo/
http://blogs.msdn.com/tims Tim Sneath - good list of new sample WPF apps

Samples
http://channel9.msdn.com/wiki/default.aspx/WPF.ApplicationPortfolio
WPF Samples
http://xamlshare.com/
xamlshare.com - xaml code samples
Build an Outlook 2007 UI Clone - http://www.ditii.com/2007/06/21/build-an-outlook-2007-ui-clone/

Smart-Client
Smart Client Software Factory WPF Support - http://www.codeplex.com/SCSFWPF
WPF layer for CAB - http://www.codeplex.com/wpfcab
Composite Application Block Lab (Part 1 of 2) (Level 300) - https://msevents.microsoft.com/CUI/Register.aspx?culture=en-US&EventID=1032278501&CountryCode=US&IsRedirect=false

Books

Tutorials
http://learnwpf.com/Posts/Post.aspx?postId=4cd7884c-2e1b-4699-8206-8321c59f4cc0

Articles
Design and implementation MVC architecture Game of Life http://www.markbetz.net/default.aspx?mode=postview&tid=917

Community
wpf.netfx3.com Microsoft's WPF community site
WPF Home on the WinFX Developer Center
XamlDev Community Site
http://channel9.msdn.com/wiki/default.aspx/WPF.HomePage

NewGroups
Expression Interactive Designer News Group.

Forums
Got a question? Ask the experts on the WPF Forum on MSDN.

Misc
WPF SDK Online Portal
http://devlicio.us/blogs/rob_eisenberg/archive/category/1031.aspx
http://www.beacosta.com/
Building a Perfect WPF Developer Workstation
http://www.codeproject.com/WPF/WPFUsingLocbaml.asp - Localization using WPF