I am interested in the tablet or convertable notebook PCs. If you have been using a tablet PC, please comment on its performance, reliability, battery, and usability. I read good reviews on Fujitsu Lifebook T4010, Acer TravelMate C300 or new C200 (with a sliding mechanism instead of the hinge), Lenovo X41, and HP tc4200. They all support minimum of 40 GB and Intel M chip. Also, can users hand write on the screen as input method (instead of keyboard) for any Tablet PCs? I saw at Fujitsu's website, some of their models are "Pen Based" and "touch screen" only, while they also list "tablet PC" model under a different category. I am interested in the reliabile (sturdy) and decent performance at the less than 5 lb package (as a max weight).