I also have rollover minutes, and that's great that you don't use yours, but I do. It only takes an outage and a 5 hour conference call to burn through a monthly allotment in a day. "Rollover" feature still does not justify charging plan minutes for a forwarded call. As for "unlimited" I do not see how unlimited "mobile-to-mobile" is the same as unlimited "mobile-to-any".
And what about those international rates? I definitely don't see an international option that offers "free calling" (i.e. no per minute fees) to international land lines with "my" AT&T plan.
Like the man said AT&T has unlimited mobile to ANY mobile now and rollover, so not only do you get the rollover you can also call ANY mobile number on ANY provider for free UNLIMITED