I am pretty excited about WWF (no, not the animal fundation, or the wrestling crazyness..) and here is a more hands-on guide as to how it might work from a developers view: Getting Started with Microsoft Windows Workflow Foundation: A Developer Walkthrough. Really looking forward to when we may orchestrate our businesslogic and services using this fundation and these tools.

Article has a pretty high score and is written by Dino Esposito, check out his blog, from Solid Quality Learning.

Download Microsoft® Visual Studio® 2005 Extensions for Windows Workflow Foundation (beta1).

Windows Vista Developer Center: Windows Workflow Foundation