Thought I'd show off my new(ish) ride....
If anyone's been wondering, how could I make my hipster tastic fixed gear a bit more practical? Here's one option; add a hub gear!
The original frame was a Lemond Fillmore from 2008, with 120mm spacing and track drop-outs.
As you can see, the hub gear is operated using one clamp-on cable stop, and a sturmey archer bar-end shifter mounted 'on the wrong way' (for left-handed shifting) with the gear cable almost completely housed. Other than that, one cable-tie on the down-tube, and a couple by the bottom bracket, and done!
Hub gears are back, folks: We've had anything from two to 11 speeds in the office in the last year and more and more manufacturers are speccing them. The FCSX chainset from Sturmey Archer is specifically designed to be paired with a hub gear and it's an excellent, if pricey, transmission option.