I have one wire running from my DSL modem to my XBO and 360. I'm looking for a cheap way to just split it so I can run either one at one time, but not have to go in the back, unplug everything, then plug it back in. This looks promising:
http://www.amazon.com/eForCity-275055-RJ45-Ethernet-Splitter/dp/B003C2YOE6/ref=sr_1_6?ie=UTF8&qid=1390235717&sr=8-6&keywords=ethernet+splitter
http://www.amazon.com/eForCity-275055-RJ45-Ethernet-Splitter/dp/B003C2YOE6/ref=sr_1_6?ie=UTF8&qid=1390235717&sr=8-6&keywords=ethernet+splitter