Now, for only $20 more you can have these guys assemble the USB-only case and drive for you, or these guys I've never heard of for only $145... but no pretty flames. Of course, if you want it to actually look good under the base station, then the Newer MiniStack is probably a better bet: the empty USB enclosure is only $60/$40 for an open-box unit, so add that Maxtor for some storage that's both functional AND stylish. Happy shopping!
Update: The trend of the comments is decidedly unfavorable towards the reliability of both the Maxtor drive and the Metal Gear case, so: message received. Here's a deal on a cheaper DiabloTek enclosure, which makes up for the extra you'll spend on a Seagate or WD drive. If you'd prefer a SATA drive, there is a Maxtor out there for a strangely low $127, as pointed out by Trojan below.