UPDATE 11/18 - Re-posted the demo project, removing references to the expression behavior samples. This removes the MouseGestureTrigger demo, but should make the project work stand-alone. If you want to play with the mouse gesture trigger, download the samples from expressionblend.codeplex.com separately, please.
Thanks to all of you that visited my talk at PDC09. I was really happy to see such a large audience and so much interest in prototyping with SketchFlow, and in the opportunities for developers to extend SketchFlow to make it possible for designers to create rich interactivity without code.
In this post: A link to the demo project, and many other links that help you getting started with writing your own behaviors.