Thanks for the replies, if I have to keep the STB it's pretty big to have in the living room just for the internet.
Actually, thinking about there are a couple of unused cable sockets, one right next to a PC, would I be able to move the STB there without much hassle? I notice when NTL upgraded us to digital they put some new box thing on the wall next to the socket, is that just needed for digital TV or for internet aswell?