I have as yet to even take delivery of my first fixed gear bike, so don't listen to me.

However, if my soon to arrive Pista works out as well as I hope, I have another project in mind, already, sort of as an art object.
It involves a DeBernardi frame.

http://www.fixedgeargallery.com/2004/e/kubek.htm

I've seen this frame on the net listed form $495 to $595.

Anyway, I find myself wondering if a person could make a fixed gear bike entirely out of Italian parts, including rims, tires, spokes, hardware....

It would start with an Italian frame.

A person could much more easily do an all Japanese bike, and maybe even have a better bike in the end.

I guess a person could do an all-Italian, an all-Japanese and an all-American bike.