A browser based app that allowed you to trace your friends on a google map and show either their current location or their birth town.
The app allowed filtering friends based on their preferences, interests and relationship status amongst other things and of course location.
Honestly, it was great. Really fascinating to see where my friends were but also their various interests quantified.
Truly unbelieveable that my app was able to access all that information for free.
Sadly, it was to good to be true. One morning I discovered that my app had stopped working because Facebook had disabled necessary API features. All that remains is the attached screenshot :(
I'm still not speaking to them ...