I talk at technical conferences regularly. You could find slides for the talks by searching on this website.
PgOpen 2012, Chicago : Deploying Maximum Architecture with PostgreSQL
HadoopDC Lightning Talk : Two Elephants in the Room!
PGDay NYC 2012: Deploying Maximum Architecture with PostgreSQL
PostgreSQL Conference : PGEast 2011 : P90X your database!!
PostgreSQL Conference : PGWest 2010 : Achieving PCI Compliance with PostgreSQL
PostgreSQL Conference : PGEast 2010 : Yet another Replication Tool: RubyRep