Introducing the Dual External USB SATA Drive Dock from ThinkGeek. This device gives you the capability to dock two SATA hard drives. You can dock either a 2.5? or 3.5? Hard Drive and it will work with your PC or even Mac via USB or eSATA.
The devices gives users a transfer rates up to 480Mbps with USB 2.0 and up to 3Gb/s with eSATA.