U.S. customers on AT&T's cellular network will get 3G iPhones for $200 (8GB model) or $300 (16GB), and pay $70 a month for the most basic service plan, which includes unlimited data, 450 daytime minutes, and 5000 night and weekend minutes. Overages are charged at 45 cents a minute. For $90, subscribers get 900 day minutes and unlimited off-peak use. Additional minutes are 40 cents each. A $110 package bumps daytime use to 1350 minutes a month, and drops the overage rate to 35 cents. The $130 plan has unlimited everything. Family plans begin at $130 for 700 daytime minutes, unlimited off-peak minutes, and the 45 cent overage rate. They top out at $360 for 6000 voice minutes with a 20 cent overage rate. Extra lines are usually $40 each, in addition to the cost of the handset, but if you pay $130 per line, a special unlimited-use family plan becomes available for $260. Yes, they've thought about it so you don't have to! Current iPhone owners who want to upgrade will pay an $18 fee and get the handsets for
$400 or $500 $200 or $300, incurring a two-year contract extension just as with a new line of service.
Update: Sorry about the prices! I still think that agreeing to subsidies in return for another two years of contract is brain-damaged: now you can, get it without a two-year contract and breathe easy.
Text messages are sold separately: $5 for 200, $10 for 1500, or $20 for unlimited use on standard plans, or $30 for unlimited use on family plans.
iPhone 3G: What you need to know [AT&T]