I've posted several demo projects to dev. community sites, and I'll continue to update this page as more are completed.

Links	( click to enlarge )
WPF Custom Controls - Without the Pain
WPF Non-Client Area Design Techniques For Custom Window Frames
An Animated AlarmBar Custom Control in WPF
A WatermarkTextbox in 3 Lines of Xaml
Bay Area .Net User's Group Project PizzaManiac 1 - Simplistic WPF layout, to support basic application structure and behavior PizzaManiac 2 - Realistic feature set, real-time WCF communication, and some UI customization PizzaManiac 3 - Significant increase in complexity, to support multiple product types