Ok, as I've said before, I love integrating of Google Maps with everything. Most recently I came across HotOrNot + Google Maps, a site that connects the hilarious HotOrNot picture database with maps that allow you look for hot or, mostly, not people in your area. I guess it's just more amusing to know that you could pass these people on the street and think to yourself, "Not!" I mean, it's ok to make fun of people who post their pictures online to be rated, right?
Anyway, on a larger scale, this sort of thing is the reason why Google Maps is so much cooler than any of the other mapping sites out there. Google provides a nifty API that allows users to easily integrate their own data with the maps and display them, which makes Google Maps far more entertaining and useful than its competitors.