2. I like it not so much as a strict security device (it's easy enough now-days to change the keyboard layout with the mouse), but as a means to discourage the annoying co-workers/bosses who rudely grab your laptop to "show you something".

4. I found my typing speed DID increase when moving to Dvorak, most likely for the fact that it enforced proper touch-typing discipline, since I _have_ to memorize the key locations now.