Carrier CEOs voicing usage-based pricing are abundant these days. Implemented the wrong way with a very linear model this could be a serious spanner in the works for the mobile internet. Flat rate data was a main driver to make it take off in the first place. I don’t think this young market (the mobile internet one) can take such a hit. Tread carefully. Keep flat rate packages with a hi-lo user pricing in two brackets only. Anything else will be dangerous, and you know it!