I put my slides for past talks on SlideShare and below are links to some videos.

Agile Cambridge talk on Growing eXtreme Programming Teams

Agile France keynote on Turning Product Upside Down

Agile Portugal keynote on Coaching Teams Through Change

Agile Singapore talk on Team-Driven Improvement with Retrospectives

Craft Conference talk on Coaching Teams through Change

Lean Agile Scotland talk with Aimy Ko on XP at Unruly

LSO St Luke’s Gamelan concert

NorDevCon talk on Building Learning Into Team Life

Back to the Future - What Ever Happened to Being eXtreme?