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.
There has not changed much in the old gmap module over the past years in my opinion and that's a pity. I really hope it's true that the dev version will give an interesting new stable release but I don't understand why they cannot just release a bit more stable versions between now and december 2008, the last stable version. I'm not so fond of using a dev version on live production sites. Hans
