Shameless bump and threadjack:

Today I came across an ancient Huffy mountainbike in an antique store featuring a set of Power Ratchet thumbshifters similar to those discussed in this thread. Trying to decide whether it'd be worth buying the thing for the $40 asking price and being stuck with yet another uninteresting frame and wheels and such to get rid of. The only other parts that really interested me were the Bullmoose-esque chromo handlebar (though not as good as a real Nitto Bullmoose because it has three straight sections instead of a continuous curve), and possibly the brake levers.