You're right, but...
I just don't understand why AT&T would be willing to sell data-only to Google when iPhone's data usage is already killing their network. And they already know about Google Voice and are trying to get the FCC on their case about it. The whole net neutrality thing revolves around this very idea, with Google and carriers on opposite sites, so I'm trying to see why any of the carriers would back this.
One argument I could see is if Google is splitting ad revenue. Besides just buying Admob, it seems that Google can entice carriers with ad revenue, meaning more profit for them even if they don't like the type of control Google is exerting.
If this actually goes through, then perhaps there really is a chance for the next Nintendo portable to include 3G.
BTW, the Google Voice quality is discernibly lower than regular voice. I switched it off on my Droid because of it.