Yesterday I rode a single speed for the first time since I was 11 years old. I bought the bike new from a local shop. It is a Jamis Sputnik. Steel frame, carbon fork, some Ritchey stuff, FSA crank, Alex wheels and it is set up single speed only, no fixie, per my request.
It was actually fun. I have a 46 crank with a 17 freewheel. Easy to set on 20 MPH on the flats. I did climb a fairly small hill called Fort Roots in North Little Rock. May ride it fairly often.