I too have recently installed the Airport Express and have 2 of the units (1 for my cable modem and usb printer, and 1 for my stereo using an optical cable directly input to the digital in on my Cary 306-200 CD player) and I have a powerbook g4 using itunes. I can't recommend it highly enough as a really cool way to attach a music server without a bunch of hassle. Sound quality is WAY better than mid-fi and, while noticably inferior to a cd played on my player, I enjoy it for casual listening and messing around and the quality far outpaces my ipod.
I HIGHLY recommend this product and, as the kid states, once setup it is super easy.
I HIGHLY recommend this product and, as the kid states, once setup it is super easy.