Fire Eagle - A Centralized Location Service

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Yahoo! Research released the beta version of Fire Eagle last week. This web service allows you to store and update your (current) location, and then it can propagate your location information to other web services, such as Flickr, MySpace, Facebook, and etc., that you have authorized. Fire Eagle claims to be
the secure and stylish way to share your location with sites and services online. We want to make the whole web respond to where you are, and to help you discover more about the world around you.
Security of location information and privacy are in question here. Also, how much can you trust Yahoo! with your location information and location history? Nevertheless, it is an interesting service and might be useful in some way.