Josh Berkus of PostgreSQL Experts spoke at OS Bridge this summer on Data Warehousing 101:
Everything you never wanted to know about big databases but were forced to find out anyway (http://it.toolbox.com/blogs/database-soup/data-warehousing-101-slides-video-up-47456 has video and slides)
Call for papers for Percona Live: MySQL Conference & Expo 2012 is open! They opened it on Friday, September 15th and the call will close on Monday, December 5th. The MySQL Conference & Expo is Tuesday April 10 – Thursday, April 12, 2012 in Santa Clara, CA. To submit a paper, first register as a speaker at http://www.percona.com/live/mysql-conference-2012/user/register and then go to My Account -> Submit Proposal.