The STIQ Reveals Himself ! ! ! !

Well there was the one guy who nearly outed himself a while back, Ben Collins.

http://www.telegraph.co.uk/culture/tvandradio/4285245/Who-is-The-Stig-Top-Gears-The-Stig-identified.html

Then there is the other guy who wrote a book and included being the stig in there and was killed off on the show: http://www.telegraph.co.uk/news/4286448/Who-is-the-Stig-The-answer.html