Geo distance / proximity search is a very common task in social networking (and other Web 2.0) applications. An examples of geo distance search can be:
And much more.
From this presentation you will know:
Alexander Rubin is a Principle MySQL Consultant Oracle. Alexander has over 10 years industry experience with the MySQL database, and specializes in performance tuning, full text search, high availability and the scale-out of database infrastructures.
View a complete list of MySQL contacts.