Basically just a map of the world, with your username and a push pin where you live - no personal contacts obviously. If we put this up on the info page it also gives people a good idea of how much of a real community there is going on here and how many different countries the members span. It's just a suggestion, but it popped into my head last night and it stuck.
No idea of how to make the map successfully, I'm not geeky enough to write up a script that does it the way I want it.
EDIT: my lovely girlfriend has just shown me this website - http://www.frappr.com/ almost exactly what I was looking for.