At the January 2009 Boston User Group I presented a session on the new partitioning feature in MySQL 5.1. I go through how to define partitions, how partitioning makes queries faster, the different types of partitioning and when to use each type, and the restrictions and limitations of partitioning.
Bruce Momjian talks about general strategies for moving application logic into databases, mostly why to do it and why to not do it. This talk is mostly DB agnostic. Note that the slides have a title of "Processing Data Inside PostgreSQL". The slides can be found at http://www.slideshare.net/EnterpriseDB/data-processing-inside-postgresql.
John Coggeshall of Automotive Computer Services presents "Top 10 Scalability Mistakes". From the official conference description:
From growing your development team from 5 to 50, or your code base from 10,000 to a million, there are clear patterns and mistakes. Join me as we investigate some of my favorites and how to both avoid and learn from the mistakes of others.
Brian Aker gives the "zinger" lightning talk about the newly announced "Drizzle". This short (under 8 minutes) video captures Aker's highlights of why he started the Drizzle project and how Drizzle is different from MySQL -- both in what has been removed from MySQL and what features Drizzle can accomodate.