The Formac Disk Mini comes in both all-black and all-white versions, and despite its name, works on both Windows and OS X.
The drives come in 60, 80 and 120GB sizes, can be connected via USB 2.0 and Firewire, and is bus powered, so you can power it off whatever connector you use. Prices range between 70 ($130) for the low end and 160 ($298) for the high end.
Product Page [Formac via Tech Digest]
