I saw a bike set up like this (belt + Rohloff) at the Portland handmade bike show last weekend. I thought it looked great, especially if you use your touring bike for commuting (as I do). Anything that cuts maintenance/moving parts is great in my book, much more important to me than before I started commuting...the weekly maintenance is getting old.

For the week or two a year I can tour, I don't mind carrying w/me an extra belt in case of disaster on the road (I was told that they only cost $50, BTW, and that they should last up to 20,000 miles).