I totally agree w/ Mercuttio. I use it primarily for productivity (although my wife laughs at that statement, because at home, all she sees is me listening to music and surfing the web). I use it all day as a calendar and contact manager, which is synced to my office computer, healthcare apps, remote control of my laptop at the office using logmein, corkulous to manage to do lists and projects. I often ride my bike to work, I used to carry my laptop in my backpack, but it was a back breaker, so I had to get an extra pannier bag just for the laptop; I now put this in my backpack, and am hardly even aware the iPad is in my backpack!
But no, I wouldn't go jogging with it ... it's more something you throw in your briefcase or backpack to carry around during the day, like you would your papers and books (or, more and more, in PLACE of your papers and books!).