I’ve been getting more into WPF and found a fantastic site for resources. It’s www.WindowsClient.net. There are frequent articles, good community support and what I found better than any WPF book I’ve read so far are the Getting Started Videos! Almost all of them are worth the watch and they are concise yet provide great explanations for the how and why of things. If you’re new to WPF this is definitely the place to go.