The manufacturer of the Printer shouldn't matter. As long as it communicates using the USB protocol, you should be fine. Additionally, OS X has a "Printer Sharing" feature so as long as the computers are on the same network, you can use the computer that's hooked up to the printer to network print. (Oh, and good luck with setting up the Airport Express! I've done about 10 installs, about 2 went smoothly)
