Hi, I've been looking at these tiny notebooks too. There's a slightly newer version of the P1500D out. There a review at this link:
http://www.pcmag.com/article2/0,1895,1844484,00.asp
It sounds like they just love it and that it is significantly better because it uses an Intel Pentium Centrino processor instead of the Transmeta chip. The fact that it's a tablet PC with a screen you can write on it very cool. They said it doesn't have Windows XP Tablet Edition though. It sounds like a good choice. Personally I want a 12inch screen instead of the 10inch screen. That's why I'm leaning toward the IBM/Lenova X41, even though it's about a pound heavier.