I got the iPad without 3G (obvious to all Apple-Nerds, since the 3G is not out yet). So, to your law-problems - you woulnd't have any. I have an iPhone, any everyone who has something similar to check emails on the run, doesnt really need the 3G function.
It is true, that you do not "need" the iPad - its luxury. But for that, its great!
I can sit on my porch, or on my couch, and check my emails, surf the web. Or if friends are for visit, I can show them my pictures without dragging them to my Computer. Or gathering everyone around my Notebook. Just so more convenient to hand the iPad around.
It seems pretty sturdy, like the iPhone (which I have dropped several times already!). Still, you should put some kind of protective case around it. Since its not built for the pocket, the minimal increase in size is O K.
Any more questions?
I used Windows for over 20 years of my life, and transitioned to Mac 2 years ago. I can only say WOW! I would never had thought, that using a computer would be so easy! You always just sit in front of it and say: yes, thats actually how I expected a computer to react!