Gang,
Rick's right. It will snowball into a big search for lat/lon coords. I will play a bit with some ideas: I may be able to do something like "ditherIng" the locations so a cluster of people appear somewhat as individuals in one city, or plot a bigger splat for a bunch of co-located Moonies...
In the meantime, if you would rummage the web for the latitude/longitude of your home city, THAT would be a BIG HELP!!
Here are a couple of sites I've found with city locations.
http://www.infoplease.com/ipa/A0001769.html
http://www.bcca.org/misc/qiblih/latlong.html
and of course
http://en.wikipedia.org/wiki/Main_Page
I don't know what will be easiest delivery, though I accept PMs through the forum. That, or perhaps have everyone edit a single post, adding their info at the bottom. Maybe the Lunar Web Gurus can offer their notions...