This article from CED Magazine describes a plan by Cable Labs (the cable modem industry research arm) to control use of NAT (network address translation) in wired and wireless hubs. For the less technical, it is the technology present in many home networking hubs that allows multiple PCs to share a single IP address. It is commonly used by customers of cable and DSL providers who only provide one IP address per customer without an extra charge. The Cable Labs' revision of NAT, called CAT, would allow cable companies to count how many devices you have connected to your hub, and charge you for each connected device.