I have to admit when I first heard about fixed gears I thought "why" but now that my Ross is going to be playing second fiddle to my Specialized Allez Pro, I thought "why not"
The only real questions I have are about gearing, I have two crank sets to choose from, both are 170mm, both have 52/40 sprockets. So far in my reading about the subject I have understood shorter than normal cranks is better, my normal length is 175mm.
I can remove the 40 tooth sprockets from both, but the 52 tooth are not removable.
So I'm thinking of going with a 40/17 gearing to start with, and just leave the 52 tooth alone.
The largest cog I can find is a 21 tooth so I don't think a 52/21 will work.