There is an unoffical modul called "Simple Map Module", found here: http://www.rustyspigot.com/webmasters/simple-google-maps-module-for-silverstripe/
Does anybody know this modul? Because, the GoogleMaps API always says, that I haven't a valid API-Key for my site, but I've generated one excatly for my Site URL and entered it. If anybody got this working, please let me know.
Regrads,
Fabi