The easiest way to do it would to be a cable/dsl router. They can be bought for about $60-$70. Mine is wireless (and wired) and it was $79 two years ago. The good thing about the wireless is that you don't have to worry about running wires all over the house. The bad thing is you would have to buy wireless cards for your other computers if you didn't want to do the wired thing. The cards can be bought for about $50 ea. pcmcia (laptop) and PCI card (regular computer). If you go the wired route, you would only need the router and NICs in all the computers (probably built in).