To 79pmooney: that great photo you posted has been my screen saver for a year, inspirational!
I tried my first single speed a couple of years ago, bought my first one a few days after trying one and now have two, a Cinelli Vigorelli track (397,27), and a Cannondale Capo Track, both with a large array of White freewheels and a choice of various cranks and rings, some 144 and some 130 BCD stuff. I barely touch my geared bikes anymore. I took my Trek Domane up to the Blue Ridge Parkway last year along with my Capo which I figured I would at least give it a try on some of the less inclined hills. After messing around with the gearing the day before I only took my Domane out once the whole week I was there , rode daily and did all the climbs on the southern end that are important to me, Watterrock,Highest area, Craggy Gardens, and Blowing Rock to the Linn Cove Viaduct. Some twice in one day. I am no physical marvel, but I find climbing on a single speed has it's own special rewards.