Just a quick post to hopefully clear something up.
There is a big difference between Guest Blogging and Article Marketing.
Article Marketing involves you writing an article and making it available to web and print publishers with Free Reprint Rights. Basically, you tell publishers they can use your content as is so long as they include your author bio with a live link back to your own website.
This is a guest blog post from Alice Seba, the Internet Marketing Sweetie.