KMLer is the ArcGIS 10 extension for professional work with Google Earth from ArcGIS.
Export to KML
Convert vector layers into Google Earth *.kml or *.kmz files. Google Earth file path set path, name and type (kml or kmz) of output file. Option Convert each object as a placemark by check create from each geometry object one placemark in kml file. All visible fields add to tags
Import from KML