This is the one I have. Not a pda/tablet, but a full blown Win XP Tablet edition PC by
OQO.
1 GHz Transmeta, 30GB HD, 512MB RAM, Wi-Fi®, Bluetooth®, USB 2.0, FireWire®, audio, thumb keyboard, 800x480 indoor/outdoor readable LCD / Tablet digitizer -- in just 4.9"x3.4"x.9" x 14oz (including 3 hours battery) package
(It's so small, you can see the barrel distortion from having to go closeup with the camera..
)