Broadband Caps Can Cost You - washingtonpost.com

Last October, Comcast set a 250-gigabyte monthly cap on its residential Internet service. There's no charge for going over that line, which Comcast communications director Charlie Douglas said "fewer than one-tenth of 1 percent" of its customers do. But if you exceed it twice in six months the company can cancel your service.

Mobile broadband services from such carriers as AT&T Wireless and Verizon Wireless have far stingier restrictions, limiting users to just 5 GB a month.

Most providers in the United States, however, continue to shy away from specific usage limits. Verizon, for example, bans "high volume" use of its FiOS service but doesn't define the term. (Every responsible Internet provider prohibits such egregious abuses as spamming.)

Rob Pegoraro - Fast Forward: Broadband Caps Can Cost You - washingtonpost.com