I have been using gmap/location quite a bit for all my larger projects before, but have now moved over to http://drupal.org/project/gmaps (with s: Google Map Tools module), which has a much easier end user interface (eg location picker) and a better more complete implementation of all the latest stuff of the Google Maps API. Its a bit more complex to setup but you also have a lot more options and possibilities and it is actively maintained with recent stable versions.