But that only works for DRM-free music, right? One of the benefits of using the Zune ecosystem with a Zune Pass is that you can download and listen to a near-limitless amount and variety of DRM-protected music, with a fantastic user experience, all for a flat monthly fee. But the DRM-protected music will only play on Zune and Windows Phone 7 devices.
(Granted, the original poster simply asked how to sync *purchased* music to a Dinc.)