First, a quick welcome to the world of wokflow blogging to Sergey, a developer on the WF team. Sergey has just posted the Workflow Manager sample on wf.netfx3.com. This is a sample application that allows you to inspect workflows that are running, change them using the dynamic update features.
Go to the website, download the sample, and see what you can do with designer re-hosting, dynamic update, and the tracking service.
This sample requires the June CTP of .NET 3.0.