Lot of people seem to be really fascinated by the concept of belt drive fixed gear bike. Well, f8cycles offers just that, custom single speed and fixed bikes with belt-drives:
"f8 began as a search for the ultimate fixed ride through the rough streets of San Francisco. Simplicity and durability were paramount. Designing a bullet-proof frame became an obsession.
The obsession paid off. f8 became the first to offer a belt drive fixed gear, in titanium no less. And less than you’d normally pay for a custom titanium frame.Using a belt means no lubricant. So you can ride to work wearing bleach-white bell bottoms, if your dress code allows. It also means no maintenance, as unlike a metal chain it will not stretch.
It’s also quiet. Too quiet."
Check out the site here: http://www.f8cycles.com/