Originally Posted by superdex
Thanks for all the info, it really helps. As far as my motivation, I'm (seriously) considering a flip-flop set up because I ain't never done this one-gear thang before, so it's a little bit of FUD* responsible for wanting the freehub. Go figure...
*Fear, Uncertainty, and Doubt
Why not build another wheel with a sturmey 3-speed hub? They have the same OLD as a track hub. Just get a long piece of housing, some zip ties or elec tape, an old clamp-on chainstay cable guide, and jimmy the shifeter onto your bars and voila--you have a 3speed track bike. You can swap as you please.
You'll probably start all the hipsters thinking that planetary gears are the next cool thing, and that maybe mesh hats and tight tshirts are on the way out.