One principle of SEO that is fairly widely accepted and taught by SEOs is the benefits of having frequently updated content.
The idea that Google and other search engines feed on fresh content is one that I’ve heard talked about on many occasions. However it doesn’t always seem to be so. I was just doing a Google search for digital photography and noticed one of Weblogs Inc’s blogs still ranking 3rd for the term – despite having retired 9 months ago and having no fresh content added (although there are continual changes to other elements of the page via it’s footer). The same blog ranks 3rd in Yahoo.
I guess it goes to show that frequently updated content isn’t quite as important a factor as other elements of SEO (particularly all the other WIN properties linking to it).