I wrote this elsewhere, but this is the "official" thread, so I'll add it here too.
I'm starting to think U.B. Stumpt is more than one person. While it could be a very awesome individual, it seems easier for a small group of people to pull this off. Plus then they could keep the secret between them for longer and laugh at us trying to figure everything out. Then again, if it's one person, they're still laughing at those of us who are trying to figure it out. And they'll probably get a huge kick out of this post!