Ah yes, AT&T's one saving grace, the fact that they had truly unlimited data (well, as long as you were on their network...), will soon be gone.
Sooner or later, there will be a Verizon iPhone. I'll be tempted, the one thing is that Verizon's 3G cannot be used while you are on a phone call, while AT&T's can. Scott, will Verizon's 4G technology allow data usage during a phone call or not?
FWIW, I am one of those who will NOT be served well by the new changes. Since I bought my iPhone 3GS in September, I'm sitting at 47.8GB of data usage, for an average of roughly 5.6GB per month. According to AT&T, the last 6 months I have used 3.6, 4.5, 8.1, 3.7, 7.6, and 5.5 GB. In those 6 months, I've spent $180 ($30/mo). Under the new "Pro" plan I would have spent $150 for the basic plan, plus $190 for additional gigs for a total of $340. $340>>$180.
So, I'll happily be sticking with the unlimited plan for now.
On the iPad, I've used 4.7GB in just a hair over a month. So, the Unlimited will work better there too.
Sigh.