The included example has a bug. The correct location of the registry entry is HKLM\Security\Policies\Shell. Thanks to my buddy Ryan for pointing it out.
So you want to use the Today screen or a custom Shell over top of the Today screen to create a kiosk device. One of the things you can do is blacklist applications and use what is called lock mode.
Thank god I travel! Or I would have been in this video. You can check out just how prepared speakers are 2 months out from an event. The video is very funny.