Now here is a single speed that would get you some attention on your commute. As I post there are only a couple more hours left on the ebay auction for this 1873 Monocycle Replica. There are no bids yet so if you have a spare $13,000 that you want to spend on your next ride, here is the LINK.
Honestly, this is a beautiful machine!
Tip of the helmet to gmr2048 over at bikecentric