This is a 3.5-inch drive bay accessory that features swappable peripherals. There are two miniature bays that can hold 2.5-inch HDD enclosures, USB hubs and memory card readers. Just swap out what you need on the fly. It's like miniature bays for your PC tower bays. Anybody's mind implode in on itself yet? The Kamarack should be available soon, and yes it will even be available in the states. Huzzah!
KAMARACK USB 2.5" the Ultimate USB RACK [Akihabara]