Sonos music systems are showing up in a lot of homes. They put music into any room of your house without hassle or wires. There are other solutions, including a good one from Apple, but the Sonos system is elegant and it "just works."
Now Sonos has added a wireless dock. Plug it into the wall, put your iPhone or iPod on it, and your device charges. You'll then have audio books, music, and podcasts broadcast to every room of your house that has a Sonos equipped entertainment system.