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I'm sure there will be, but as of right now I don't see one on Apple's site.

I'd imagine it will be much like the previous docks where you use your normal data cable to connect the dock to power/computer and there will probably be an audio out TRS jack.

No doubt it'll be a Lightening cable connection for the dock, so don't get hopes up of re-purposing all those 30-pin cables.
 
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