Do you have one of the new Thunderbolt enabled iMacs or MacBook Pros? If so, check your software updates, because Apple has released a new update for all Thunderbolt-enabled Macs to address the stability and performance of the Thunderbolt interface.
The update files indicate that so far, there are 3 machines that apply for the update: The new 21.5 and 27-inch iMacs, and the new 2011 MacBook Pro. With a number of Thunderbolt devices due out this summer (any time now, really), this will probably come in handy sooner than you think.