I've got an ipad (I didn't buy it, it was a gift, honest) and it's pretty much replaced my netbook as my college-going companion. I can look stuff up on the internet quickly, access my work via dropbox and edit it if need be. Oh, yeah, and play scrabble with friends when we're supposed to be working. Good times.
It's lighter than my netbook too, so i don't have to carry around this massive chunk of plastic any more, just a slightly less massive chunk of aluminium and smug.
It's really good for idly surfing the internet on the sofa, but i could never do any prolonged work on it, the touch screen keyboard works well, especially if you can touch type. it's just too much of a distraction, i guess. I mean, why do work when you've got Sword and Sworcery EP you could be playing instead, or reddit to check on. Curse you, attention span.