JK has posted his review, it's very thorough.  Thought I would provide a link for those who may have missed it.  Too bad Sony hasn't figured this out and elected to preinstall the Tablet OS so that the general public can enjoy the experience.   It's a natural fit.

http://jkontherun.blogs.com/jkontherun/2004/07/sony_u70_review.html 

The VAIO U also serves as a multipurpose device. Thanks to Evan for sending me the following link:

 http://www.i4u.com/section-viewarticle-53.html

enjoy