Flickr

http://www.flickr.com/photos/meanjavaidyll/846174354/

Here's my photo, which was taken in Seattle on my most recent vacation. Flickr has been the most successful social tool I have ever used. We made some friends on a cruise we went on two years ago and now all the friends post their photos on Flickr and that's how we keep up with each other. Because of Flickr, we're now taking another vacation with the same group in February. It's a great site and fun to search for new photos!