The BBC is planning to launch a PVR service called iMP (Internet Media Player.) It will be using Microsoft DRM, and will only work on Windows PCs. It will have a rolling 14-day schedule (one week previous and one week ahead) and will use some sort of a P2P backend for content delivery.
Why am I almost positive this will fail miserably?
BBC ponders P2P distribution [theregister.co.uk]
More details of BBC iMP revealed - All content DRM'd [digital-lifestyles.info]