Virgin Media on Wednesday began an Ashford, UK trial of what it says is the fastest cable-based Internet service on Earth. Using a high-end implementation of the DOCSIS 3 cable modem standard, the carrier says it's offering 200Mbps downloads to 100 testers; the speed is faster than 160Mbps Japanese service and twice as fast as the 101Mbps Optimum Online service in the US. The bandwidth is said s