One of my favorite things online is my 7days flickr group. Four times a year, we each take a self-portrait every day for a week, upload it to the group on flickr, and comment away. It's amazing how much you find out about a person and their lives in 7days. I first found the group through Elaine, then met Bethany there, got to know Bonnie better... basically, the 7days group is the bellybutton of the internet. (And no, there's no fuzz in there.)
Sarah is another friend I met on 7days. Because we're friends on facebook, I knew that Sarah and her lovely family were on vacation somewhere close-by. We messaged back and forth and decided to meet at a shopping center for lunch when they were on their way back home.