Palm Pilot Robot Kit
I posted about this late last year but it looks like these kits are being shipped now. Acroname Inc. has begun to distribute something called the Palm Pilot Robot Kit. Developed at Carnegie Mellon University, it is available in two kits: the Easy SV203 and the Barebones SV203 for $299 and $259 respectively. Users can develop the software to drive this robot themselves by using a C and Java-like language called TEA (Tiny Embedded Application) which can be compiled on a variety of platforms.
Missed this earlier but BrightHand shows how to overclock your PocketPC.