I am thinking of joining Talk talk broadband and phone. My friend has it and he has to connect the modem using the Ethernet cable. The trouble with this for me is that my wife uses that cable to connect her xbox360 to the computer, how would i get around this. or would I have to go wireless modem route.
If you get a modem/router most if not all of these have 2-4 Ethernet ports. So all that you would need to do is to connect the XBox 360 to one of the ports on the back of the modem/router and the Ethernet cable from your PC into the other.
I wouldn't advise a USB modem as most (possible all) USB modems are not capable of providing the highest speeds of broadband. Also connecting a modem/router via a Ethernet cable gives arguable the reliablest connection.
Below is a link to the advantages/disadvantages of various kinds of Modem.
Once you activate your wireless router providing you have a wireless receiver like a PCI Netgear receiver or a USB receiver, it tells you to unplug the Red Ethernet cable in the wireless setup on TalkTalk because that's what I'm on. So the Ethernet port is left free to use the Xbox 360 on. I hope this helps.
If you don't want to go wireless,then get one of these click here and buy another 2 lengthes of ethernet cable if one doesn't come with Talktalk's wired modem. Use it to link up the wired modem and plug the other end into usually no.1 port,plug the second cable into no.2 port and to the back of your pc's ethernet port. Finally another cable for the xbox 360 and into no.3 port, if the modem's on all the time, all devices can go online simultaneously.