Apple retail staffers will also be roaming the lines and prequalifing people for iPhone purchases. Once you've been prequalified you are issued a ticket that is good for an iPhone 3G. You can use the ticket right then and there (when it is your turn, of course) or return later in the day.
Sounds like a pretty fair system to me. Have you stood in line for an iPhone lately? What do you think of Apple's new methods?