Intelligent Site Structure for Better SEO!
http://dev.opera.com/articles/view/intelligent-site-structure-for-better-se/

De Valk, Joost
Opera
2008

Abstract:

Search engines are one of the most important traffic drivers to sites these days, which is why Search Engine Optimization (SEO) is becoming more and more important. SEO is often thought to be just a set of some technical tricks, and as a professional SEO, I confess to spending a lot of time with clients fixing technical issues. A site's structure though, is just as important. Your site's structure determines whether a search engine understands what your site is about, and how easily it will find and index content relevant to your site's purpose and intent. By creating a good structure, you can use the content you've written that has attracted links from others, and use your site's structure to spread some of that "linkjuice" to the other pages on your site.