Google offers many extensions which add new functionality to your brower: http://www.google.com/support/chrome/bin/static.py?page=guide.cs&guide=27542.
One I particularly like is “Select to Get Google Maps” extension which allows you to easily generate a Google Map from any address that appears in your web browser: http://www.google.com/support/chrome/bin/static.py?page=guide.cs&guide=27542&topic=27546&answer=174131.