Over the last couple of nights, I installed Itunes on both of Sharon and my laptops. The HP Media Center PC in the den has about 1,600 songs in Itunes. Using Itunes capabilities, it is possible to access this library from either laptop when connected to the home network. The laptop can play these songs on the speakers attached to the laptop or select the speakers connected to the Airport Express and play music on those speakers.
Last night, I was sitting at the island in the kitchen working a Christmas letter on my laptop, connected wireless to the home network, selecting songs off the computer in the den and playing the music on the speakers attached to the Airport Express in the kitchen.