Julian Hyde presented on creating interactive OLAP applications with MySQL Enterprise and Mondrian. He discussed Mondrian's features like OLAP cubes, MDX queries, and schemas. He also covered olap4j, an API that enables clients to connect to multiple OLAP servers like Mondrian and SQL Server Analysis Services. Case studies showed how Pentaho and Mondrian helped organizations like Frontier Airlines optimize pricing and Loma Linda University provide healthcare analytics.