MariaDB, the Backward Compatible Branch of MySQL(R) Database Server

MariaDB is a community developed, backward compatible, drop-in replacement branch of the MySQL(R) Database Server. What is MariaDB all about, and what is its future? What can you do with new features added in the first GA release of MariaDB 5.1, such as additional Storage Engines (Maria, PBXT, XtraDB, FederatedX), …