Dynamic Prototyping with SketchFlow in Expression Blend is a book coming out in late 2009 (Actually now Q1 2010) through Pearson and Que Publishing and is being written by Chris Bernard and Sara Summers. It will teach you everything you need to know to create rich and dynamic prototypes using SketchFlow in Expression Blend.
Here you can get updates about the progress we're making on the book and download a preview chapter and the associated projects that go along with it.
The preview chapter will teach you all the basics you need to know to begin using SketchFlow features in Expression Blend right away.
There are four files to download. We recommend you download all of them and place them in your Documents/Expression/Blend3/Projects directory.
Simple select the following links to being the download process.
Dynamic Prototyping Preview (8.5 Megabytes)
Prototype Start (8.5 Megabytes)
Prototype Finish (10.5 Megabytes)
Source Art (1.0 Megabytes)