Most external hard drives share the same basic aesthetic features: A plastic or metal shell and some blinking lights. For something different, check out the VHS hard drives offered on the CentennialMerchant store on Etsy (an Ebay-like site for handmade goods).
CentennialMerchant is offering a number of repurposed VHS "classics" (surely up for debate) as external hard drive enclosures. It's a very slick-looking modification; the VHS tapes even include their original sleeve!
With the USB cable removed, the tape enclosure is almost indistinguishable from a working VHS, save for the hard drive serial number peeking out from behind the acrylic window. If you find the current selection of tapes lacking, you're welcome to request a specific title.
Prices are currently set at $US124 for a 500GB drive, and $US104.99 for a 320GB drive, though CentennialMerchant will also create a custom enclosure for a 640GB drive upon request.