I see so much mis-information in this thread.
I have a family plan, 2 iPhones, 1 Blackberry, 2 normal phones. Five total phones.
Been with ATT since they were called BellSouth Mobility and featured the Moto StarTAC and it was the cream of the crop.
I have bought too many phones to count from this company.
I my self have gone:
StarTAC, A few Nokias, Sony W600i, Cingular 8525, Blackberry Pearl, Blackberry Curve, iPhone 3G.
And according to Apples web site, I have to pay full price.
there are a crap ton of factors going into this. when did you buy your 3g? when was the last time someone on your plan used a subsidy? all these things work into it. if you pay more per month it WILL speed up the process... but that doesn't mean it's only going to be 2 months. It might be 8, it might be 10, maybe 11.