[jessriedel]

The article you link to really doesn't support your claim. Yes, bandwidth is plentiful off-hours and expensive during peak times, so pricing based off of total usage regardless of when the data is used is crude. (This is why voice plans have had things like "weekend minutes".) But a heavy user really does have a higher marginal cost than a light user. In the absence of more complicated pricing (which consumers often reject), data caps are reasonable.

[ori_b]

I'd love to be able to pay reasonable data charges per megabyte. The problem is that overages are currently insane, compared to what it costs for fixed monthly rates.

[jessriedel]

Agreed. This exists for the same reason the costs of text messages are so exorbitant: lack of competition.

[bdb]

Doubtful. I think both are too expensive, but both data and SMS plans are only able to be priced where they are because of breakage[1].

[1] http://en.wikipedia.org/wiki/Breakage