Dennis,
Been watching your site for a while. One of these days I'll get around to taking pics of last summer's fixie project so that I can get them on the gallery and also on the website (dampfixie.org) that Michael Rasmussen and I put together. It's nice to have a bike that, even with a big heavy NiMH light on it and fenders, weighs the same as a Serotta with 10sp Dura Ace!
This winter, though, I started dreaming about making an even lighter bike.. and one that can travel easily. Luckily, I've worked for 4 years at Bike Friday and have access to the tools I needed to put it together.
I started with our lightest frame, the Pocket Rocket Pro. We don't normally do these fixed since folding requires removing the chain, but I threw some Surly fork ends on there. The mainframe was actually one we had laying around and since it had such a nice fade paint job, I didn't bother to take off all the other little bits and pieces like the front derailleur hanger.
I started the project as an uberlight bike but got so excited about the darn thing that I just gathered up a bunch of old heavy parts and powder coated them black just to get riding on it. Even as spec'd, it's still 16.5# with a saddle soaked from the rain Eugene, Oregon's skies presented us with on this morning's commute. I anticipate a few changes in the future that will lighten things up some more, including drying that thing off!
Anyways, I know your light gallery is mainly composed of geared bikes (ewww...), but thought you might like the idea of adding this fixie to the site. If not, to be the 3rd folding fixie on the gallery would be exciting enough. Thanks again and here's the spec:

Frame material: 4130 CroMo, baby!
Headset: Chris King GripNut 1.25"
Stem: BF Custom Ultralight riser with a cheap Dimension ahead stem
Bars: TTT Forma's cut down to bullhorns and painted black
Crank: Shimano 105 170mm painted black
Chainring: Vuelta 50t painted black
Chain: KMC Z-51
Cog: Surly 13t
Lockring: Surly
Seatpost: Kalloy Uno 27.2 x 350mm
Saddle: really beat up Terry Fly Ti
Front hub: American Classic Ultralight 16 hole
Rear hub: Surly New Hub Flip Flop free/fixed 32 hole converted to QR
axle with a beefy steel Suntour QR on it
Spokes: DT 2.0/1.7/2.0
Rims: Alex R-390 32 hole
Tires: Schwalbe Stelvio 28-451mm

Walter Lapchynski - walterl@bikefriday.com