It's a small interface to GoogleMap that allows you to do the following things:
Browse the entire GoogleMap database
Swith from GoogleMap/Satellite, MSN Virtual Earth Maps, Ask.com and Yahoo!Maps
Switch between satellite or map view
Zoom in/zoom out
Do request to google maps, and show results on screen
Save your favorite locations
Have access to some rss feed to discover some new locations
Can be extended with your own data...