In case you were concerned by the subject line - no, Gossamer Gear is not getting into building treadmill desks :-)
I just got some more pictures from another successful treadmill desk project. This one was done by Grant Sible (president of Gossamer Gear http://www.gossamergear.com).
Grant's design is quite clean and elegant. He was able to use this off-the-shelf laptop table from Amazon http://amzn.to/HCqfqs . He also uses it in combination with a wire shelf (barely visible in the photo) which he pulls closer if/when he needs to have other reverence material close at hand.
Grant tells me he is also tredmillin barefoot, and loving it!
Note: For those of you who would like to know more about Grant and his company, check out the great interview over on Hiking in Finland: http://www.hikinginfinland.com/2009/11/interview-grant-sible-from-gossamer.html