I see, to be used while walking around, and without say looking at the screen and using a stylus, is a plus. As for me, I use the foldable when I can, and when I want to make a quick jot, or don't want to stand out as much I use fitaly soft keyboard for stylus input.
http://www.fitaly.com
Just curious, what kidns of typing speeds to you get on the thumbboard? I tried one out at staples, and it seemed like it would take some getting used to, but also that two fingers is slightly limitnig. but who knows, I never woul edhave guessed I would have surpassed my longhand writing speed with a stylus either...