All you need is a cable BB router with 4 ethernet ports to share the 'net with other devices (or get a wireless router which will still have ethernet ports on the back to connect other devices)
Useful info
here (In the 'Useful Info' forum

)
Wired router:
http://www.cableforum.co.uk/cgi-bin/...mId=B00005KAC7
Wireless equivalent:
http://www.cableforum.co.uk/cgi-bin/...mId=B00008DOYO
HTH.