A while back my Dad wrote a column for the Georgia Peach Cochlear Implant Association (GPCIA) which was picked up and reblogged in another post. He talks about his personal experiences using Transcendental Meditation (TM) and Tinnitus in the post. The comments are interesting too, particularly laughing crow's comment.
Here is a link to the other post. http://ppbnews.blogspot.com/2008/11/tinnitus.html
Makes me think that maybe I need to go back to practicing TM. Or at least try it for a while and see if it makes a difference.