Then tell me why Nokia would release a phone that is quadband GSM, no carrier in Europe uses 850/1900 for GSM/GPRS. They include it so that people can take their phone to the US and use it here, on spectrum that is "Cingular's property". I'm sorry, your argument just does not hold up. Its more likely that: 1) Cingular thought the price was too high and could not strike a deal with Nokia to get the subsidized price in the right ballpark; or 2) Nokia realizes that they have not marketed S60 at all here in the US and they would have a tough time competing with WinMo for market share.
I also don't think it has anything to do with price or cost. This phone is going to cost about $1,000, a few extra bucks to include a tri-band 3G radio is nothing. Plus, if Nokia wanted to they could get a better deal than almost any other company for these chips given the volume of phones they produce and sell. The fact is most people would not plunk down $500-$600 for this phone when they could buy a Treo/TyTN for $400, when they don't even know what S60 is. Even if everyone on this forum bought a phone from Cingular at that price they would take a huge hit. Furthermore, the money Nokia would make from those of us willing to spend $1,000 to get a triband 3G phone from Expansys etc., is a pittance.
Some will say it is because Americans are behind the curve compared to Europeans. Well, I blame Nokia. If they wanted to sell these phones here they have the money to market the hell out of S60 to the point where everyone would know about it. They have chosen not to for whatever reason. Thus, they are at a disadvantage when dealing with Cingular who knows they can not charge the same price for these phones that they can for a WinMo phone. T-Mobile is not stupid either, unless they do a deal with Nokia for phones they can sell both here and in Europe they won't carry this phone here. If Nokia wants to be a player in the US smartphone market they have to suck it up and spend some money to advertise and offer their phones at greater subsidies at first, just like Lexus did when they were trying to establish themselves.