Computer Question For The More Hardware Minded

So I go to uni on Tuesday. Welcome to the world of LAN and horrible LAG. To cut the story short I have one Ethernet port malarky in my room and I have a computer requiring an input and a PS3 needing an input. What's the quickest and CHEAPEST way I can get both plugged in simultaneously? I don't want to cable switch all the time.

....a router?

*shrugs*

router

a switch, you can get them really cheap.

"a switch, you can get them really cheap."

buy a cheap 4 port router.

DONE