Today I have been attending a MySQL Web Seminar: Web 2.0 and MySQL. It has been interesting and the spoken english of the presenter (Jimmy Guerrero) has been crystal clear for me. The sound is sended by a telephone call but its free and the slideshow and Q&A session is performed using WebEx, a Java application. It has been a new and exciting experience for me and I will repeat on next seminar. The presentation hasn't been very technical but some ideas and charts have been really impressive: Wikipedia bears 25000 SQL requests per second. Mixi.jp has a MySQL cluster with 100 servers which is bearing more than 3 million users, 70% of them active.