Ordered the 64GB iPad with 3G and all the accessories available. Love my iPhone and see lots more potential in the iPad. iWork alone will up my productivity on the iPad significantly compared to the iPhone. I'm going to try to make the iPad my main roaming computer.
One reason I went for the iPad: Apple gets touch in a way Microsoft and companies like HP don't. Part of it is software and part is hardware.
I can do almost anything with my fingers on the iPhone's relatively small, but highly selective screen. On my 13" 6-times-heavier-than-the-iPad HP tx TouchSmart tablet PC I usually have to hit/swipe my target with a finger or multiple fingers several times before the hit/swipe registers. In TouchSmart mode, paging through objects on the HP is also hit and miss. Sometimes the object moves, sometimes the application flips over to another and sometimes nothing happens.
And for those who worry about finger prints and peanut butter and jelly on the screen, if my iPhone is any indication, wiping anything off the unscratchable screen will be a no-brainer and, even covered with finger prints, the screen hides them when you look at it head-on.
I'll write about my experience with the iPad after I get it toward the end of April.