The current event lists are from Seattle Weekly, Town Hall, Seattle Performs, and Yahoo Upcoming Events - more sources will be added in the near future.
The location management is an optional account that you can use to share your location with groups that you create or join. With it you can send and receive invitations and selectively share your location. *Note that your location information is used solely for your account, is not used for other purposes, and is stored securely.
Acknowledgments: The Serendipity applications (including the HTML 5 web app): use APIs provided by Google MapKit, Google App Engine, Factual, Geocoder US, Google Places, and Echonest. Thanks to the makers of these APIs.