I am a breadmaker, and by that I mean that I make bread several times a week. I can honestly say that so far in 2010 my family has not eaten commercial bread except for hot dog and hamburger buns - Partly because when i made my hot dog buns, my dough didn't rise for a looooong time and I ran out of time and had to buy some.
Anyway, I used to use the 'proofing bread' setting on my oven from time to time to control the temp so that my dough would rise properly, but now I use a different method. Instead of leaving my oven on for 1 hour at the proofing bread temp, I just turn my oven on at 350 for 2 minutes and then shut if off. The oven gets warms enough without geting hot, and the stays warm long enough to get the job done! and of course it uses less electricity.