[wrp]

The market is too small. I had a HP Jornada 720, and it dramatically changed how I worked. I followed the several later projects that tried to continue with small size, touch-typeable keyboard, and desktop compatible OS, but they all fizzled from lack of market interest.

[wrp]

Just adding...I haven't thought about these devices for a long time, but now looking at the things that are available, I realize I wouldn't even want one now. Notebook computers have become so light that it's not a hassle to carry one in my bag, and suspend mode works well enough for "instant on". There isn't the great advantage there used to be.