One reason I'm not interested in the iPad: a picture
Let's see, left-to-right, past the Ubuntu "Show Desktop" icon: Top Shelf, the trash can (doesn't really count), Firefox, Open Folder, Writer's Café, Five-Or-More (what I'm doing instead of writing, sadly), OpenOffice.org (I should be writing); then, past the gap: Evolution, RhythmBox (playing The Decemberists' The Crane Wife, and finally a utility applet containing time, battery, weather, that kind of thing. Then the logout icon. Not shown: the screenshot applet that captured what you're looking at.The point being: yeah, multitasking.

Comments
Doesn't mean it's not a cool device for people who have a use for it.
But, I've never been an early adopter. I can wait.