A few things to get you closer to that SINGLE SPEED that you have been craving....
SINGLE SPEED COG
close out on a SINGLE SPEED FRAME
SURLY BIKES, 29' Potential Karate Monkey or the standard 1X1
then there is the "poor man's single speed" (from the mind of Keith Bontrager)
or you could buy my old Huma Huma Nuka Nuka Apuha ah
make an offer!
what else is there in the world of single speeds?
oh course....Sheldon Brown!
that should be enough links to wet your appetite