I’ve come across a few cool maps of Google+ users to try to help find users in your areas. Both are relatively sparse, since they require users to manually add their locations. Still, they’re quite cool.
Ravi Lakhani | Google Maps
Ravi’s map uses an openly editable Google Map in which anyone can add a pushpin of their location.
Michael Sersen | Google Fusion Table
Michael’s map is generated by data that you put into a form.
There are a few others floating around, but those seem to be the most solid. Have you found any others that are any better?