For those users in US who have ordered the iPhone 3G S, you might get the iPhone 3G S shipment earliest by tomorrow (June-17th) according to someone who notified engadgetmobile on his tracking detail. AT&T has start to accept pre-orders last week, and has planned to start selling the iPhone 3G S in its retail stores from June 19th.

Updates 1: More users are reporting the same notification received, however, some users have noticed changes to delivery date to June-18th instead of June-17th.