Wonder what the Storm from BlackBerry will do considering it will work (if allowed)almost anywhere. It is a full CDMA and GSM phone. Welcome to the future.
Better be powered by a nuclear battery if you want to be running 2 cellphone modems at the same time.
It probably wouldn't be all that hard for them to have a software or hardware switch that toggles between the two different chips. It'd do no good to have both running at the same time.