does this one http://www.compusa.com/products/prod...82388&pfp=cat1
come with all the stuff you need or do you have to buy the thing to put on the toher comps?

You still need to get the wireless cards for whatever pc'* you want to connect to it, otherwise yes, it'll work.

th ose cards are expensive

how bout a good cheap wire one? and one w/ only 1 port because i have a netgear 4 port hub...so i can just put the router into a hub port and then wires from the hub to the computers and share teh high speed on all 4 right?

I have a D-link 4-port broadband router that I got at OfficeMax for $20. It'* sufficient for home use...

You won't need the hub at all. A switch or a router will replace it, but a router is preferred.

Some cheap routers dont have the switch built in and only have 1 port. You will need another hub or switch for multiple computers...

Hub = Pooled bandwith (IE 100Mbit total for all ports)
Switch = Dedicatied Bandwith to each port (IE 100mbit to each port)