Elgato (http://www.elgato.com) is shipping the Thunderbolt SSD, “the ultimate portable high-speed storage solution.” It combines a solid-state drive with Thunderbolt technology.
Housed in a metal enclosure, the drive draws its power directly through the Thunderbolt port and operates completely silently. The Elgato Thunderbolt SSD is available immediately for US$429.95 (120GB version) and $699.95 (240 GB version).