Apparently I have not been under as much of a rock as I thought. WWF (no relation to World Wrestling Federation :) ) has only recently been announced with what appears to have been very little fanfare.
There is what appears to be a fairly in depth article by Dino Esposito called “Getting Started with Microsoft Windows Workflow Foundation: A Developer Walkthrough” available here. And Microsoft already has a site up here on MSDN linking off to all sorts of interesting WWF goodness.