I love the google maps api.

http://l0ser.net/h/

I built that for when I went to Hawaii last October. I updated it via cellphone. As I was short for time while developing it (plane was leaving soon) I convinced ricin to write something that would grab my images from emails. I've since written a better method of doing that, as our code didn't like each other and now many of the images don't show up on the proper points or don't show up at all. It was cooler to watch the daily progress than it is to look at it now, but it was a fun project. All images are viewable at http://l0ser.net/h/images/