I have a PB with an airport extreme card. There are three other computers in my house - an imac, an emac, and a PC laptop. Mine is the only computer that has wireless capabilities. Currently, all computers are have internet access through a hub that is attached to our cable modem. My question is this: is it possible to have a wireless router (airport extreme basestation or other) that simultaneously creates a wireless signal for my PB and also allows hardwire connections to the other computers? Can the same cable modem signal be split so that both a wireless and a wired network run off it seamlessly?