Johnon.com - Google Barters Backlinks to Show The Way

Good article I missed a while back on the nofollow debate and how Google is using posters to their help forums to help themselves:
Google Barters Backlinks to Show The Way

Hamlet Batista dot Com - Do we follow? A Look At The Notorious Nofollow Attribute

Article covering the debate about Google's rules regarding the nofollow attribute for paid links and PageRank sculpting:
Do we follow? A Look At The Notorious Nofollow Attribute