If you're interested in making a TiVo style thing with a massive NAS somewhere then it's probably cheaper to just build it yourself from other parts. A fanless VIA EPIA board, Hauppauge PVR 350 card for hardware MPEG + TV out and something like MythTV to run it all. You can have many clients all running off a single server and multiple tuners as well.

Nah... It's cheaper and better to just buy yourself a Replay that has this functionality built in and in Peter's case is built by another branch of his company. It wouldn't do a whole lot of good in the UK, however.

Matthew