When getting a new computer, there is always the issue of how to get your stuff off of the old one, which is often not even functional, like the time I knocked a full glass of water into my power supply (oops). This elegantly designed little product not only helps you with this problem, it also gives that old drive new purpose. It works on both IDE (old wide cables) and SATA (new little cables) drives, and lets you plug them into your USB port.
I always keep my old hard drives when I get a new machine, both for security reasons, and as backup, but then they changed the cables. This adapter not only lets you get your data off those old drives into your new computer, it also makes them into a better way to back up your data than DVDs, which I find unreliable, or the lesser capacity of flash drives. It supports the newer USB2 as well, so it works quickly (for USB).
Or you can go straight to Buy.com:
Cables Unlimited USB 2.0 to IDE & SATA Adapter Cable w/ Power