Through KarstenJ comes this gem of a tutorial in the Expression blog that walks you through building an interactive media player using Expression Interactive Designer for the Windows Presentation Foundation.
I went through the tutorial end-to-end tonight. Along the way, you'll:
The tutorial is eloquently written and showcases quite a few concepts. As you follow along, I encourage you to toggle back and forth to peek at the XAML Code that Expression is creating for you behind the scenes. The process should take under an hour.
I did the walkthrough using the June CTP of .NET 3.0 (formerly WinFX) and the June CTP of Expression Interactive Designer, all of which is holding up rather well on my army of long-suffering laptops.