Frazz is so inside-cycling it's scary! He's always wearing at t-shirt under his work jumpsuit with the logo some product only BikeForums members would get. He's worn the logos of (off the top of my head) Crank Brothers, Cervelo, Richard Sachs, and many others. When they show him riding, it's usually a jersey of a peloton team. I swear last month he was wearing a QuickStep kit in a few strips.
I have a t-shirt from Hampsten Cycles that has a Jeff Mallett (the guy who draws Frazz) rendering of Andy Hampsten's lengendary Gavia crossing, only with the Seattle Space Needle in the background.
Cervelo has a t-shirt for sale on their site, too, with a Frazz strip on the back.