I got to the Apple Store at Walt Whitman Mall at about 8:30 AM and the mall doors were open. There were already about 150 people waiting for their iPad, and the Apple Store folks had two lines set up: one for advance reservations and one for walk-ins.
As a pre-order customer, I gave my name to a blue-shirted Apple person and was told to wait on the reservation line. For each 10 people with a reservation they would let in one person without, so perhaps they had something of a handle on inventory. There was coffee and water to be had while waiting and a quick look inside the store showed so many Apple workers that I couldn't imagine how any customers would fit. At ten minutes to opening, a huge crowd of blue shirts ran up and down the mall screaming at the top of their lungs to pump up the crowd, but we didn't need pumping up. Everyone was really psyched already.
I talked to a few people while waiting to get in, and I met someone named Theo who had a real reason for buying an iPad: He's a DJ and wanted to use it to kick off videos while performing. Most everyone else had vague answers about why they were there, ranging from, "it just seems really cool," to "I don't know what I'm going to do with it, but I need one."