This is a spin-off of ElBoogy's "Have you met other players in RL?" thread.
AO players
*EDIT*: since we've had trouble with vandalism I've removed public editing privileges. You can send me (or anyone else with editing privileges) a PM with your e-mail address, and I'll give you editing privileges ASAP. Alternatively, make a post in the thread with your home town and I'll add you when I get around to it.
HOWTO for when you have received editing privileges:
1. Activate Edit mode in the sidebar to your left.
2. Pick the "add a placemark" thing on the upper left corner of the map.
3. Place it in your home town.
4. Write your forum name in the Title, and optionally add some alt names in the Description.
5. Click the Done button - it's replaced the Edit button you clicked earlier.
I would recommend against actually picking an exact location such as street or even house, just place it in your home town somewhere around the center and peoples can bugger you on the forums if they're going to be visiting a place near you.