Ryan Cousineau wrote in message
[regarding multi speed fixed gears]

another option would be the Schlumpf
two-speed "mountain drive" BB, which might work with a fixed gear:

http://www.sheldonbrown.com/harris/schlumpf.html

wow. what an idea. ive heard that there are still multi speed bottom
bracket setups on the market. up to five speeds, did i hear? would
these work for fixed gear? are they made for standard bb shells?

very curious,
anthony