Anecdotally, I hear hills cited pretty often as a reason not to bike-commute. I live in Pittsburgh and the city is taking biking more and more seriously, but th

Anecdotally, I hear hills cited pretty often as a reason not to bike-commute. I live in Pittsburgh and the city is taking biking more and more seriously, but there's only so much one can do about topography. An electric boost could make a big difference for some. (Then again, if you live on the hill and work in the valley, the morning commute is pretty fun!)