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Thanks, will do

Thanks Gregory, its a tricky question.

Actually, these articles are "posts" on a wordpress blog, but I am not using category pages or monthly pages or other things that would make them look like a blog. Instead they are linked into my website through the homepage, through category page, and every product that they are about links to these article pages. Really there is no difference between a blog post and an article. The difference is that a blog usually integrates its content into your site in a way that is both dumb for your visitors and for SEOs.  So, use the posting ability of wordpress for its convenience, but build those pages into a website using the traditional methods that serve visitors and SEO.

I've refined this to a new question here: http://moz.com/community/q/should-each-physical-store-have-its-own-ecommerce-store-on-subfolders-or-share-a-single-national-one

Thanks Thomas

Thanks Steven