There was a map, but it is dead. I wish it wasn't.
There really is no barrier to people adding their own locations to a map, or to the forum generating a map based on (fairly general) location information provided in member profiles.
Data protections is a challenge, but my reading of the regulations makes it clear to me that you can store most kinds of information (including location and date of birth) if you (a) document why you are keeping it (b) tell people you are keeping it (c) give them the opportunity to opt out. Some information is more tricky to hold, such as medical, financial or legal stuff or information about children.