Not sure if this will float your boat, but I think it's White that has a new single speed hub out that's just sweet. Flip flops for fixed gear and single speed and has tensioners built into the axle. Haven't seen it on a bike yet, but it's damn cool.
may be Crank Brothers, now that I think of it.
Nope, it's made by White Industries. Harris Cyclery has 'em, for about $100/hub.