http://i.gizmodo.com/5458397/the-ipads-onscreen-typing-solution-isnt-a-solution-at-all
Typing in portrait is better than anticipated but still quite a stretch for our average-sized hands, which means that letters like F G and H will take a moderate conditioning for some. What about in landscape mode, sitting flat on the table? Well this is problematic too, as the iPad sort of wobbles. The back is not perfectly flat, meaning your typing surface is never perfectly flat, so the virtual keyboard becomes that much more difficult to use.
Sounds passable for a media consumption device, but seriously, this thing's got its own version of iWorkyou're supposed to type on it. That explains the giant hardware keyboard attachment, I guess!