Maybe you should test out that new phone that just came out. It's inbetween the size of a tablet and a smartphone and it comes with a pen. If the pen really works, I could see that as being handy. I bet it would go over big with engineer types who like to scribble diagrams and such.
My biggest issue on the touchscreen as oppsed to a keyboard/mouse is presision. Sometimes links are small and close together, so I hit the wrong one, and, as has been said, sitting down an typing something more then a paragraph or two is a PITA.
I'm interested in that, but just upgraded to my current phone (a Droid Bionic, so I'm not exactly crying here) 6 months ago [soupnazi]No upgrade for you![/soupnazi]. Otherewise, I'd totally make the jump. It'd just be too expensive for me to do so now, and I've got so many other things I need to spend money on - new windows, deck repairs, one or more actual new computers to replace my current aging systems and let me run the software I'll need for class in the summer or fall semester (which I also need to buy, come to think of it)...
I suspect it would be uncomfortable to use as a phone due to its size, though a Bluetooth headset would mostly solve that; I wonder if it's big enough to function adequately (for most people, I mean) as a small tablet? The pen thing seems cool, again if it works.
I'd take an Ipad if someone gave me one - I'm entered in a couple of giveaways for the new one, actually, and think it'd be pretty cool to play with if I won - but wouldn't pay for one; I'd be more willing to pay for a Galaxy or something like that, probably, but am still not about to run out and pick one up.