AppForMap is a collection of PHP modules for web mapping. The project comprises both clients and server for dealing with simple features, GML, WKT, WMS, WFS, PostGIS databases etc. It can also act as a backend for an OpenLayers frontend.
This PHPscript allows You to plot bubble charts on Google Earth. Have Your data in a query, view, table with fields: folder, name, latitude, longitude, radius, color, additional data. Set the DB parameters in the config file, and enjoy the results.