Are there external drive enclosures yet with a Thunderbolt interface? I'd like to put some spare disks in enclosures and use the Thunderbolt interface. Does such a thing exist yet? I can't find any. Are there technical issues or licensing restrictions that have stopped this? My searches have turned up no general purpose enclosures and I find that surprising.

This seems like a ServerFault issue but I was sent packing here instead.
Taken from Apple.com


  Promise Pegasus R4 and Pegasus R6,
  LaCie Little Big Disk and 2big,
  Seagate GoFlex Thunderbolt Adapter,
  Elgato Thunderbolt SSD.