SketchFlow is a feature of Expression Blend 3.  If you aren’t familiar with SketchFlow, then you should check out:

http://www.microsoft.com/expression/products/SketchFlow_OverView.aspx

“SketchFlow revolutionizes how quickly and efficiently you can demonstrate your vision for an application. It provides an informal and quick way to explore, iterate and prototype user interface scenarios, allowing you to evolve your concepts from a series of rough ideas into a living and breathing prototype that can be made as real as a particular client or project demands. This rapid, iterative and cost effective approach to prototyping allows you to concentrate on what matters most, being creative and building the best solution for your client, on time and within budget.”

Digging into SketchFlow has been on my TODO list for quite some time.  In many ways, I am glad I hadn’t gotten around to it.  A week or so ago, Adam Kinney blogged about:

4 Expression Studio 3 Starter Kits available for download

One of the starter kits is on SketchFlow.  I just finished it.  If you want to get your head around SketchFlow fast, then this is the resource for you!