Here are some pictures of my fixed gear. I have posted them in a few other places in this forum so I apologize if they are duplicative.
I built this bike up when I was working as a mechanic at a shop in Boston. One of the customers came in with it after getting "doored. The door hit the down tube and chipped the frame... he thought it was cracked so he brought it in to buy a new frame and switch the parts over. I explained to him that the frame was fine, but he still wanted a new frame and gave me this one. So I built it up with a mix of parts. Old school campy pista crank, with a 54/18. It looks like I am pushing a monster gear, but with the 18 in the back I get a pretty standard gear ratio... however, I also get a really smooth ride and I don't think I will ever wear out those gears.
Anyway, here it is: