If you ever wanted to compare the satellite imagery data from Google Earth, Live Maps and Yahoo! Maps, look no further than Flash Earth (caution, this may be an illegal site)
Flash Earth is a Adobe Flash based mapping service that works inside the browser and fetches mapping data and aerial pictures from several mapping websites including NASA, Microsoft, Yahoo, Ask.com and Google.
Tip: if you know the coordinates of a location by its latitude and longitude, you can enter these figures into the search box and be taken to that position. www.flashearth.com