Before you plunk down for an external drive, check out the clever yet poorly named SATA HDD Stage Rack. It's like an iPod dock, but for spare SATA hard drives you may have lying around. GeekSTuff4U.com is selling the SATA HDD Stage Rack for the odd but reasonable price of $46.79. The dock accepts 3.5-inch desktop drives and--with an insert--2.5-inch laptop drives, and it works with both PCs and Macs. It's unclear if the dock can be powered solely by USB, or whether it's necessary to make use of the dock's DC-in port. Sadly, there doesn't seem to be an IDE version.