I usually throw out the numeric coolness factor because it tends to vary depending on where I'm riding. Here in L.A., that can vary anywhere from 1.95 to 2.47. Aside from giving me a tremendous workout, fixed gear riding definitely turn heads. I'm constantly complimented & asked what I'm riding by pedestrians. Girls constantly come up to me which never happens when I'm on a derailleur equiped bike. Yeah....coolness factor is definitely high when you're fixed. Here's one of my fixed...
http://www.tc-homes.com/bike/forum/fg-bikes/leakos2.htm

George "coasting not allowed" Leakos!