How Hot are you?

I don't think anyone has a doubt that geo-localisation is the hot topic of the moment. With all these apps coming out, one has to wonder what add-ons will get creative with the services.

As a avid Foursquare user, I'm particularly interested in observing how this highly addictive app will be both monetized and extended.
I just recently came across Where do you go is which is an interesting add-on that aggregates your social mobile locations to create a heat map.

Here's mine:



In the words of Paris Hilton, that's hot.