I'm waiting for the day when we're all charged a dollar to check our email, or worse. I'm sure they'd charge text message rates for broadband internet if they thought they could get away with it. Ten cents a byte would be pretty sweet for the ISPs. I'm sure they could whip up an astroturf group to prove they're non-viable without charging by the byte.
Buy 10 bytes, get one free - just like the grocery store! Such a deal!