Read this: Virgin Media aims to block Project Canvas with Ofcom complaint | Media | The Guardian

Summary: Sky maintains that there is no rationale for the BBC's involvement in Canvas and is understood still to be considering its options over whether or not to lodge an official complaint to regulators. Virgin Media has complained that Project Canvas has wrongly rejected what the company considers fair offers of integrating the technology into its own set-top boxes with a compromise on user interface. It is thought that Virgin Media believes that at this stage it is not worth pursuing a case against the BBC in Europe on the grounds of state aid. - guardian.co.uk