Link. This would make Smartphones much more appealing for kid use:

“AT&T mobile business CEO Ralph de la Vega told CNet this week that his company intends to offer a “family data plan” in the near future, allowing consumers to buy an allotment of data that can be used by multiple devices.”

I don’t see how this works with contract subsidy payback though. Currently per-user data plans basically pay for the subsidized smart phone.