What's that have to do with anything? The iPhone is going to have to be on a high-limits/unlimited tariff anyway, so that doesn't matter. Sure that's a reason for having it turned off at the moment, but it's not an argument for not having it on the iPhone. You're going to be shifting the same amount of data looking up a route in Google Maps whether you're on GPRS or 3G, it's just one method is painfully slow, and the other isn't.Plus, data is still expensive.