Tim Sneath posts a good set of resources to start your journey with WPF.
He references my PDC 2005 Lap around WPF talk. I wonder how that talk would change with more mature tools now?
I'm beginning to post information for each of my talks (including my demo script, etc...). If you are interested, check it out.
My PDC 2003 talk was better rated by attendees than this talk...