Apple has updated their retail page to reflect their new retail store policies to accommodate the ongoing demand for the iPhone 3G:
Your favorite Apple Retail Store is making it easier and more convenient to purchase an iPhone 3G. All stores will now open at 8:00 a.m. every day but Sunday and, to accommodate demand, were adding staff to help you get up and running as quickly as possible. Customers will be prequalified to purchase while in line and will receive a claim ticket for an iPhone 3G. Your ticket can be redeemed on the spot or if it would be more convenient to return later the same day by 6:00 p.m. (4:00 p.m. on Sundays).
Apple is opening stores early and offering claim tickets to avoid lengthy line waits in line.