This Hard Drive

NewEgg.com has the .com has the Cooler Master RX-3HU-LAB1-GP Aluminum, Plastic and metal 3.5″ USB2.0 External Enclosure for $27 - $15 rebate (Expires 8/31) + $7 shipping = $19 shipped after rebate. Check out the customer reviews for some feedback on this one.

Product description from NewEgg.com:

T!
ool-free & Easy Installation
Unique Fan-less Silent Heat Dissipation Design
USB 2.0 Hi-speed Ports
HDD Shock-proof Mechanism
Supports All 3.5 PATA Hard Disk Drives up to 500G
MultiTRAK Technology provides transaction translator per USB port to ensure that hard disk and the other USB devices have best performance
Attractive Blue LED for power and red LED for HDD Activity
Stylish Anodized Aluminum Cover and Stand
Plug & Play and Hot-swappable
Compatible with both Windows and Mac OS

Product link.