Re:iTunes + Airport Express (Score 5, Interesting)

I second this. If you're already using iTunes, it's a no brainer. They're cheap ($100 new, ~$60 on eBay), contains all the networking stuff inside the box. I connect them to small powered speakers in the remote rooms (Klipsch ProMedia 2.1) and it just works. I've had Crestron and Control4 stuff before for TONS of money, and it just always seemed like overkill for my needs.