Some cases are USB 2.0 ONLY and don't have USB 1.1 capability. This creates headaches for some owners. I picked up this model -> http://www.geeks.com/details.asp?invtid=A-8818-N and it was USB 1.1 and 2.0 plus doesn't need a power supply. It was 7.99 during a sale.

It works very nicely for my uses.

Bob