I've spent much of the past few months getting to grips with WPF. I'm still nowhere near the point where I can claim to be expert in this great new technology, but I thought it might help others if I blogged links to resources that I have found to be particularly helpful.
I'm sure I will add to this list as time goes on, but (in no particular order) here are some links that I'm sure you will find useful if you are just starting out with WPF.
Jessica Fossler wrote a handy transition guide for WinForms developers . Print it out; I'm sure you'll want to refer to it again and again.
Lee Brimelow put together a series of video presentations, some of which cover using Expression Blend to create the tricky stuff in WPF.
An ongoing series of video demonstrations by MSFT Bill Steele is also worth checking out. Bill's blog has links to his "Soup to Nuts" WPF series of videos and also sample code can be found via his blog.
Books are tricky, because everyone has a different idea of what makes a good book. However Adam Nathan's "WPF Unleashed" seems to have received almost universal acclaim. For a relatively thin book (though unexpectedly heavy for its size), it definitely packs in a huge amount of material and is well worth a look. Although the code behind is in C#, this book will still be useful to Visual Basic developers as most snippets are relatively short and there is a great deal of useful and well explained XAML code.
I have several other WPF Books and will write reviews of them over the next few weeks.
Charles Petzold has written some detailed and useful tips and tricks type articles for the MSDN Magazine.
I'll add to this list as I find (or "re-find"!) more resources that I have found useful.