No matter what kind of consumer electronics you make it seems you've got to add some sort of internet device to the portfolio. Sharp's addition (at least in Japan) is its 5-inch Netwalker that has a touchscreen and runs Ubuntu.
The Netwalker, also called the PC-Z1 in the official literature, seems to be somewhat pocketable with its 6.3 x 4.2 x .9-inch build. The thing is the ultimate tweener with an ARM Cortex-A8 based processor, 4GB of on board storage, and 802.11b/g Wi-Fi, but no 3G or WiMax. It reminds me a lot of the UMID mBook M1, but with a slightly bigger keyboard.