Motorola is making them for some time now, but they do not seem to be available in europe (does anybody know where they sources are, BTW? Their modified Linux kernel should be available...). Some German firm seems to be making them too (notebook-like clamshell design with qwerty, NICE!), but they do not seem to be available at all. But hopefully they'll become more common now: Philips 960 should be based on cellon.com 's C8000 platform, which is Linux-based according to CellON.
If you know where to get one, be sure to let me know.