July 2006 - Paul Duvall's article "Automation for the people: Continuous Inspection" on developerWorks discusses CPD.
June 2006 - Andrew Glover's article "In pursuit of code quality: Tame the chatterbox" on developerWorks discusses PMD and JavaNCSS.
June 2006 - Tom Copeland's article "Static Electricity: Better Living with Static Code Analysis" in Better Software discusses PMD/CPD analyses of Azureus and Columba.
April 2006 - John Ferguson Smart's article "PMD Squashes Code Bugs" on DevX discusses PMD and the Eclipse plugin. Lots of screenshots!
November 2005 - Mike Clark's article "Staying Out of Code Debt" on StickyMinds mentions both PMD and CPD as useful code-checking tools.
October 2005 - Levent Gurses' article "Improving Code Quality with PMD and Eclipse" in EclipseZone talks about the PMD Eclipse plugin and explains many different facets of PMD - XPath, writing rules, the AST, all that. Good stuff!
June 2005 - Amit Chaturvedi's article "Java & Static Analysis" in Doctor Dobb's Journal talks about PMD and shows a screenshot of the rule designer
March 2005 - Kirk Knoernschild's article "Benefits of the Build" in Doctor Dobb's Journal mentions PMD as a way to automate code reviews