If you know that you can dance through the night on four inch stiletto heels.. then you definitely should because there are so many lovely heels to choose from. When I got married, my personal philosophy was to choose the cheapest shoes I could possibly find because I was only going to wear them once. There ought to be a bridal shoe exchange online so that some other girl can break them in for you.
Anyhow, I didn't wear them nearly at all. They hurt so much after 2 minutes that I took them off and stood there shaking hands in my stocking feet. It was a long dress so no one cared. If I were to do it all over again though, I would spend a little more time on this detail and get it right.
You can always go for the Father of the Bride look w/ sneakers. One of my cousins wore bright kelly green chuck lows (more on that later) a great look and you CAN wear them again.
But, for those of you looking for Cinderella's glass slipper, you'll have to put out a little more effort. Look around. If you don't have time, Zappos ships free both ways.
Whatever you decide to do, consider this sage advice given in Better Than Beauty, A Guide to Charm written in 1938, but still true today, "Your face can't look serene, your conversation can't be bright, your personality can't radiate, if your feet hurt."