Breathing Earth gives you a realtime look at the effect that different countries have on climate change. Showing you the amount of Co2 being produced as you watch. It also includes, death rates, birth rates and other interesting data.
Twittervision and Flickrvision are projects that mashup their communities in real time with Google Maps. A 2-D or 3-D globe shows where people have just uploaded images to Flickr or have updated their Twitter status. Amazing and totally addictive.