maps, maps, maps, maps!

Maps Compare is a site that allows you to compare Google Maps, Yahoo Maps, Bing Maps, and Google Earth browser plug-in on one page. To use the service just enter the name of the place you're searching for and Maps Compare will display that place on all four maps at once. Zoom in or zoom out on one of the maps and you're doing the same on the other three.

http://geshout.com/mapscompare/all.php