Back when I was 3 or 4 and my Mom was pregnant with my little brother she used to take me to a public pool several times a week. The last time we went there the locker we were using was broken in to and my Mom's purse stolen. I didn't really understand the situation though I knew she was upset. As we walked back to our car I saw something that I thought would cheer her up, "Look Mommy it's me!" and pointed at the picture of myself laying in the gutter. She started crying and gathering up the photos discarded by the thief and strewn in the gutter. I didn't understand at the time she was crying because she was happy to get the photos back. Unfortunately the one picture she never found was one taken of my Dad at his college graduation, she's continued to lament it's loss for 30+ years.
About 15 years ago my wallet was stolen from the back room of the place I worked. Actually I told most of that story here. There was only about $3o in it and my credit card company reversed the fraudulent charges and at this point I'm even over the feeling of violation but what still gives me a pang of regret is the pictures I was never able to replace.
I just found Ifoundyourcamera.net and think it's a great idea. I know how crummy it feels to loose pictures that mean something to you. They have a pretty good success rate (not quite 10%). I looked through the whole site but didn't recognise anyone but it was still kinda fascinating. It's interesting seeing so many pictures of happy strangers on vacation, celebrating birthdays/hollidays, and holding new babies. It's worth checking out.