Lol, I'm well and truly self-titled
It is good to see samples like this. We recently had a WF4.0 talk at the user group I run and it really made me ask myself why the hell we weren't looking at using it in almost EVERY app we were writing. Even for relatively simple tasks like email verifications, having WF handle reminders, flagging of unactivated accounts etc is just so much less hassle to implement, and even more of an advantage if those rules need to change.
Your unit test still stinks though