Google is bringing Hotpot, it's new recommendation service, to the world after a limited release back in November. Hotpot basically allows you to rate restaurants, cafes, hotels and the like so that when you or your friends are searching for such venues Google can provide "trusted" results. The Google special sauce is based on your likes, your friends likes or properties that are similar to those that you or your trusty friends like. Access to the service is made available via the web (google.com/hotpot), google maps (maps.google.com), or your android phone.
Keep an eye out for those Unicorns!