On the Ibuildings techPortal site today they've published the latest episode in their Dutch PHP Conference 2009 podcast series. This time it's Eli White's talk on highly scalable web applications.
A constant pariah on web applications is scaling once you become popular. It's not always an easy task (ok, never). This talk will go into depth on a few of the most common techniques for making your website scalable. So that you can leave with enough knowledge to apply this, if needed. Or just to plan ahead so that your future projects don't preclude taking these steps when needed.