I have my NTL Cable BB plugged into a wireless router and then the wired cable that used to run from the settop box runs from the router to my machine.
Additionally my children (both at Uni) and my wife can use the broadband connection on their laptop(s) or desktop anywhere in the house (and most of the garden), using USB or built in adapters.
I also set up a local network with my machine and one laptop. This means that, as long as my machine is on, the laptop can, wirelessly, send to either of my printers (as long as they are switched on too!)
I obtained an Actiontec NTL brodband router 'kit' at a reasonable price in an auction and they are still sold via NTL I believe. However exactly the same router, minus the usb adapter, can also be bought at numbers of on-line stores at a somewhat cheaper price.
Hope this helps!