It seems to me the Member Map could do with a bit of an overhaul. Whenever there are two users in close proximity, it becomes rather difficult to distinguish them. If we switched to a zoomable slippy map like OpenLayers, this problem would be solved.

All it would really take is to switch the script that produces positioned marker images to one that produces GeoJSON, KML, GML, or whatever.

I slapped together a quick mockup using OpenLayers and OpenStreetMap.