Ask and ye shall receive...
Here's a public Google Map for all of us to mark our locations on. It should be open for public collaboration:
I also have a second one as suggested for those of us who are willing to facilitate purchases for out of towners, look to the "The Facilitators" thread here:
for that map.
EDIT: If any members want to be on the map but NOT sign up for anything at Google, PM me with whatever location you'd like to be associated with and I'll add you to the map. Also, the maps were created under a new Gmail account I created for the purpose. If I should go away for some reason I can pass that account info on to someone else.