I am new to the fixed gear thing, and think its very interesting.
In my country, i never saw one fixed.(only a 14" whem i was kid, but i dont remember the feeling).
There are some customized 20" SS bikes minimalistic only with coaster brakes, high seat posts and bars for a relaxed riding position, they call "nuvem" (cloud).
If i could make something like with Fixed Gear, it would be pretty unique, and people would go nuts, ever more if they see a Trackstand.
I tried to though about, and my only concern was about inclining at turns and dont be able to control pedal position, or passing over bumps.