Apple have posted details on their website about what customers should bring to the store when buying an iPhone 3G.
“What to bring.
To purchase and activate iPhone 3G, you need the following:*
* Credit card
* Social security number
* Valid, government-issued photo ID
* Your current wireless account number and password or PIN (if you’re new to AT&T)”
Apple remind current iPhone owners to sync their phones before heading to the store. Also anyone wanting a corporate account will need to contact AT&T directly.
Sales will start at 8 am on a first come, first serve basis. As with the original iPhone, Apple will post stock status on a daily basis once the iPhone 3G goes on sale.