At least the overages of $10 for every 50 GB isn't too unreasonable compared to previous attempts at this - $1 per 5 GB, or $0.20 per GB isn't crippling. On some level I agree in principle with a pricing system that passes costs on to heavier users.

I do find the timing critical - I bet over the next few years that 98% figure will look a lot different as data consumption skyrockets. Get people hooked on the principle of paying by the GB now, the ISP's cash in later...