The 2.0 branch of locationmap now support the Google Maps API V3. This is the current version of the maps API at the time of writing - V2 was deprecated as of May 19, 2010. That said, if locationmap 1.x is set up and working for you, there's no need to upgrade - The V2 API will continue to work. (The main issue is for new users - V2 keys are no longer available. V3 does not require a key.)