See the video for a really cool tablet that is being developed by Microsoft. I am imagining apple tablet will be something like this. Check out the video on the page.
Courier is a real device, and weve heard that its in the "late prototype" stage of development. Its not a tablet, its a booklet. The dual 7-inch or so screens are multitouch, and designed for writing, flicking and drawing with a stylus, in addition to fingers. Theyre connected by a hinge that holds a single iPhone-esque home button. Statuses, like wireless signal and battery life, are displayed along the rim of one of the screens. On the back cover is a camera, and it might charge through an inductive pad, like the Palm Touchstone charging dock for Pre.