"Bike Travel Consultant" (aka a bike salesman) for Bike Friday wanted a lightweight commuting bike. He started with the Pocket Rocket Pro and ended up with this 16.5 pound piece of fixed-gear art.
Other Fixed Fridays are featured on Bike Friday's Fixed page. Walter also pointed me to Fixed Bike Friday bike porn from Guy and David.
I almost forgot to mention: Walter blogs about Bike Fridays, bike culture, bike transportation, and bike stuff in general. It's good stuff; check it out.