As several people have already noted, Google has made some major changes in their most recent update. The weblogging community was hit hard… (link)

Mark Pilgrim is known for his in-depth reports on various phenomenon – now he's taking on Google's recent attempts to re-balance their search results to prevent PageRank abuse.

It's a tricky problem to solve, and Google has ruffled some feathers in the process. Mark covers the topic with his usual completeness and efficiency.