Recommended by Daring Fireball readers: ThinkGeek :: External USB SATA Drive Dock.
Sold by ThinkGeek, which I'd forgotten about. It's nice to see they're still in business.
Unfortunately ThinkGeek does not use Google Checkout. Makes me wonder how geeky they really are.
I'm done with creating vendor specific accounts. If a vendor doesn't support Amazon or Google Checkout, or at least an OpenID authentication, forget 'em.