Someone told me recently about an Apple hard drive that could supposedly be plugged into your stereo with a sound jack, and would also use wifi, so you could keep your music on the hard drive and play it to your stereo from your computer.

It would also serve as an external backup, wirelessly backing up your computer's hard drive regularly using Time Machine.

This sounds handy dandy, but the two Time Capsule devices that Apple offer don't seem to have any sound jack socket. Anyone know what the story is?