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Hotpot is an online, friends-based recommendation engine that takes scores you give places using Google Maps 4.7′s new homescreen rating widget, and uses that information to improve your own place search results and those of your friends.
Set your public Google Places nickname, your ratings of places are public on the web with this nickname.
Google already has access to all the review data but now it's time to own it.
It all makes one wonder if Google even wants 3rd party sites in their vision of the future.