Synchrotech lent me a Delock 42513 Bus Powered Thunderbolt External Enclosure for SATA 6Gb/s 2.5-in SSD/HDD. It is billed as one of the first bus powered cases, and I am unaware of any others. I only had a Western Digital WDC WD3200BEKX-00B7WT0 320GB HDD on hand to test it. It mounted no problems, and the speed tests were in line with a hard drive of it's type. Bus power is a long overdue feature, but welcome nonetheless.