I'm looking for some good real-world examples of interaction between Windows Presentation Foundation and Workflow Foundation. Most of the WF tutorials I see demonstrate use within console applications. I'm more curious about applications that use a rich WPF interface and WF. Particularly if they allow user defined workflows (allow users to design and run their own workflows on the fly).
I'm not sure what exactly you're looking for, but here are some links to information about actual real world applications using Workflow in desktop (WPF) applications in one way or another: