Other than that it's all about the freecoaster's in Flatland where the cranks stay still regardless of which way the bike rolls so the crank arms don't get in the way.
G-Sport/Odyssey are bringing out a Freecoaster that apparently by adusting the paws inside the hub a certain direction you can go from FC to a fixed gear.
A Flatland rider by the name of Trevor Meyer ran a Fixed wheel for a while and was busting out some crazy moves.
http://expn.go.com/athletes/bios/MEYER_TREVOR.html
Other than that it's all about the freecoaster's in Flatland where the cranks stay still regardless of which way the bike rolls so the crank arms don't get in the way.
G-Sport/Odyssey are bringing out a Freecoaster that apparently by adusting the paws inside the hub a certain direction you can go from FC to a fixed gear.