X2 bhai get an Apple Airport. It allows up to 50 devices to connect to it, gives out it's own IP addresses, and it acts as a LAN server and computers can transfer files between them and store files in the HD connected to it. It's amazing, dad just set it up and we are having fun and oh it is fast.
I guess you can connect up to 250 devices to any router that has DHCP or non DCHP(assigning IP)
50 devices is just may be an example. I have not much idea about Apple Airport.
and many other routers can do the same as what it does..
even like AVM routers (europe) they are having built in HD funtions to operate torrents even if PC is off.