Everyone with half a dozen synapses makes fun of the "chin, " but it looks from your video this morning that it makes it really easy to hold and operate one-handed. I'm always hitting my Amazes home button playing Quell, so a little "finger rest" seems brilliant. Let us know how that works for you out and about.
With expandable memory (that I presume can be encrypted), great battery life, and fewer gewgaws, I'm thinking this could be the best One for busy business people who can't charge every 3 hours and already have their hands full. Will be interested in your real world user experience with the Little One That Could. ;-)