Ok, here's the scenario: Suppose I have two, maybe 3, computers in the house. One is a Mac, the others are PCs. They are no more than 40 feet from each other and are connected to the Internet via a cable modem (Comcast High-Speed Internet). What would I need to connect them both to a wireless network using Airport? How about without Airport (are there any alternatives)? Once I have the equipment I need, how do I then go about setting up the network?