Cambronne's thread in Rants and Raves got me thinking about what cyclists really DO wear for their sport, and whether it makes much difference, one way or another.
Me? I couldn't care less how the people I ride with are dressed, but I do wear technical clothes -- lycra shorts, a colourful cycling jersey, sometimes one of the two team jerseys I own [they're just the best quality jerseys that I have], coolmax socks, cycling shoes. I've just found that it's more comfortable and efficient, but then again, I AM a roadie.
I know from experience that the clothes/bike do not make the man. I know of a guy who wears full team kit and rides a Pinarello who couldn't keep with even a 35 km/h paceline if his life depended on it. Nevertheless, being from a fashion-obsessed part of the world, it's be interesting to see what people are wearing this summer/fall.