Dane,

It's an interesting approach you've taken to fighting duplicate content. I'm still looking for the solution that doesn't require work. Even my WordPress plugin, WP Spinner, which takes a different approach, also requires work in the sense that one has to define alternate content versions when you write the content. The plugin then uses the alternate versions to make each page view of the content unique, meaning Google never finds exactly the same text when it visits a particular post or page. My rationale was, if the text of a post differs when it's displayed in the single post view and the category archive view, for example, then there can't be a duplicate content issue between the two views. Another day, another approach. :)