I spent yesterday afternoon and last night getting a pretty good idea of what this baby does and doesn't do. Here are a few preliminary thoughts:
Setup is easy, but a bit slow. I plugged it into iTunes, selected what music, movies and apps I wanted to copy to the iPad and I was on my way. It seemed like the sync took forever, and subsequent syncs are VERY slow. Lots of spinning beach balls. Maybe it's my system. Maybe not.
The iPad alerted me that there were quite a few app updates that gave direct support to the higher resolution screen, so I was happy for that.
How is the iPad to use? In a word, interesting, liberating, sometimes frustrating. It's heavier than I thought it would be. I think for most people, it is not a one-handed device. Sitting on my lap, or on a table, it's just dandy. As others have noted, the iPad is very snappy. Web pages render quickly, graphics are quickly updated. The screen is beautiful, and movies and photos look striking. The screen is very reflective, so you may have to fiddle around with angles if you are in a room with sunlight streaming in.