My roommate has a hp tc1100 which is also a tablet. They are pretty cool lightweight does everything you need. The only drawback is no built-in cd-rom. You usuallyhave to buy a docking station and cd-rom for the dockingstation. And the dockingstations arent very portable.
ActuallyI don't see a dockingstation for the one Tim_Axe suggested and they have a faster processor so I may look into one of those when I go shopping for a new computer.