Hello!
My name is Norbert and I am from Hungary, expert in Javascript, AS3, PHP, and Drupal.
I can help you and we can and work on this together in EU time.
I am interested about the details on this project, since I am not a big fan of Joomla,
but Google Maps :_)
I can develop the 3 cases easily,
1, geo-location - if user enables - ( needs https however)
2, address search... np,
3, point on map, np.
(If u look on my profile u may see not so much reviews, because the previous job i accepted here, turned into a long term relationship, so i didn't use freelancer.com after.)
Let me know, and good luck with your project anyways!
Sincerely
Norbert