A very special HardDrive in the xBox 2?

According to Games Radar, the xBox 2 could eventually be connected to an external harddrive via a proprietary interface. This "drive" might as well be used for storing and listening to MP3/WMA in a standalone fashion. To top it all, it should cost a mere $100. The xBox not being released before a while, Apple has all the time it needs to cook up something in response.