It's here! Google has released Panda update 2.2. This time around, Google has - among other things - improved their ability to detect scraper sites and banish them from the SERPs. Of course, the Panda updates are changes to Google's algorithm and are not merely manual reviews of sites in the index, so there is room for error (causing devastation for many legitimate webmasters and SEOs). A lot of people ask what parts of their existing SEO practice they can modify and emphasize to recover from the blow, but alas, it's not that simple. Rand of SeoMoz.org discusses how the Panda updates work and, more importantly, how Panda has fundamentally changed the best practices for SEO.