Pardon my ignorance but I was hoping someone could explain this to me.

I was under the impression that ATTs cell phone network is non-3g. I've
heard it referred to as a 2.5g or 2.75g network. Now if Apple releases a 3g
iPhone won't it need a 3g network to run on? How will folks who subscribe to
ATT be able to take advantage of the speed?

Thanks for any info!