FWIW, entering the URL of a KML file as the search string of a "Business" search using Lionscribe's code works, but entering the actual KML data does not (just like in GMM itself).
Unfortunately, this rules out writing a glue application to accept files of MIME type application/vnd.google-earth.kml+xml or extension .kml via the Exchange Manager, and feed them to GMM. Such an application would allow one to tap on KML links in a web browser. -- For information on using the PalmSource Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/