I didn't have a chance to real all the responses, so I apologize if any of this is a repeat. My husband has very strong views on the subject, and asked me to post for him.
He was not circ'd as an infant, but ended up with an infection of some sort when he was a toddler. At that point, his mother regretted NOT circ'ing him (as it was the norm at the time), but the infection cleared up, and in 27 years he hasn't had another problem.
When we found out I was pregnant, we briefly discussed what would happen when we had a boy. I was against circ'ing but wanted to hear his opinion. He flat out said "No way, never, I would never do that."
I brought up all the arguments I had seen on message boards I visit. You know, being different from other boys at school, being tormented in the locker room, the cleanliness issue. He had a valid reponse to each and every one. First, circumsizing is becoming more and more obsolite in our culture. In fact, in many Canadian hospitals, doctors are refusing to do circumcisions now. As for the locker room argument, he told me that he never had anyone comment on his "junk" at school...and he knows that had anyone mentioned someone's naughty bits in a positive OR negative way, they likely would have gotten beaten up by one of the other guys. About the cleanliness issue, he doesn't smell, have man ooze, or anything down there. He says that as long as you wash yourself (which you should do every day regardless of what type of part you have) then you most likely won't encounter problems.
I had a friend who was circ'd when he was 18, due to problems with his foreskin not pulling back, which made sex painful for him. I brought this up, and asked what he though about circumcisions as a precautionary measure, and he thought that was ridiculous. He told me that often, your appendix or tonsils will get infected, and will have to be removed, but you don't see them performing those surgeries on newborns as a precautionary measure. It's silly to "fix" something that isn't broken yet.