I recieved an email from Gamestop today, no more rumors about the reserve policy:
Limited PlayStation 3 Pre-order
GameStop and EB Games will begin accepting limited pre-orders for the PlayStation 3 console on Tuesday, October 10, on a first come, first served basis. Due to extremely limited supply, we expect to deplete this allocation very quickly, most likely in minutes. We will not accept additional pre-orders at this time. To avoid an unnecessary trip we strongly recommend you call your local store to determine availability. A $100 reservation deposit is required, which can be funded with cash, credit or trade. As we cannot control production and shipping issues by the manufacturer, a reservation deposit does not guarantee receipt of a system available to purchase at launch. Reservations/Purchases are limited to 1 per household.