This post makes no sense...
Where do they make the money?. Not on the phone since you bought it somewhere else and not on the service since they are discounting it to you.
It is on the phone service. Why would the mobile phone company care if you bought the phone from them or someone else? They've giving you a discount in either case. Why do you think they have early termination fees? If it were a discount on the phone, they wouldn't care because they already made their money.
They make their money on the monthly phone service and want to lock you in to guarantee their return on the investment which was the original discount to lock you in.
This could go a variety of ways. Its possible that Apple would sell the phone and Cingular would give you a discount to sign up for 2yrs of service. They could conceivably also offer service without a discount on the phone for a lower monthly rate, but the phone companies are very accustomed to locking customers in and would be nervous to offer that.
On the other hand, folks talk about Apple offering an iPhone without service as if there's no downside. Consumers are accustomed in this country to get free phones, or $59 phones. What will they think when they walk into an Apple store and see a $399 or $499 phone? How many people will actually spend that much on a phone that can be easily lost, stolen, broken. They'd have to think about it for a while. If Cingular gives them $150 to sign up for a 2yr commitment, lowers it to $250. Then if they figure they would have bought a $200 iPod anyway to get that functionality, then $50 for having a phone in addition to the iPod is pretty cheap (assuming the price for the iPhone isn't even higher).
I wonder how big a market there is. Given that most folks already have cell service and are locked in for some amount of time. And given that most people who want an iPod probably already have one, I wonder how many folks will plunk down that much money to switch.
I have a potential $600 early termination fee and just bought an iPod nano, but I hate Sprint and would consider switching or at least trying Cingular (we don't have T-mobile in my area).