I know which one you mean. Don't worry if you did miss it though, as you can view/download it from the GTR Central ftp server. All you have to do is click the link below and it should be the bottom one in a HUGE list of GTR related mpegs!
basically a computer and hard disk that completly replaces your VHS ... you can pause live TV and it lears what you like watching and auto records all the time ... so when you get home, basically your TV schedule is packed with your favorite stuff.
Plus, never need to see an ad again (which is great for Sky who have 5min+ ad breaks)