Yes, I do build track bikes but I also build stuff like this-a fixed gear frame oriented toward longer road training. The difference is the slacker angles and longer wheelbase. The bottom bracket is still pretty high as you have to be able to pedal through corners.
This is the fixed gear equivalent of the 'Ulitmundo' frame that I build for road. The tubing is pretty much the same set. The s-bend on the chainstays are very subtle so that there is ample clearance for the narrow q-factor track cranks. When this one is built up I will get some good photos of it as early next year I plan an overhaul of my website.
The frame will be fitted with an Enve tapered road fork so that a front brake can be employed.