There are a lot of people reselling. Since Apple lets you buy two, if you're waiting in line and you only want one, there's a powerful incentive to buy a second and try to flip it for a profit.
What you're seeing in large cities is a whole different thing; you've got the same people out there every night. These people are poor, speak little English and have few opportunities. Thus, they place a low monetary value on their time. The opportunity to make a quick $300 is incentive enough to get them out there every night. These people have probably bought ten or twelve ipads each from the apple stores, and when the daily shipment is small, they get 100% of it, because most real consumers just aren't willing or able to start lining up at midnight.
The guys flipping their extra iPad on Craigslist are not the problem, although they present a strong argument against allowing customers to buy two units at launch. The people who round up dozens of poor immigrants and use them to buy up 100% of the stock, day after day are the problem.
Of course, there are a lot of Asians in NYC and elsewhere who are legitimate consumers of these products. But if you go out in the morning and see the line, the first 100 people or so will look conspicuously unlike Apple consumers, and if you watch them long enough, you'll see them all come out of the store and hand off their purchases to someone in a car.
This is not scapegoating; it's a real phenomenon. That said, Apple's really getting these into stores every day, if you made it before 8 to the NYC 5th Ave store today, you probably got one. Or, more likely, two.
I hear ya. I'm frustrated too. I wish Apple would ship some of the online orders out instead. I live in Manhattan and ordered one on March 11 online, still waiting.