GoArticles is a good place for article publishing. In addition to offering an easy to use platform, and a pretty reasonable editorial submission process, they also have widgets like the reader below you can add to a site to keep a check on your submissions. Good for SEO SELP rank placements, and a lot of information published by other authors is good for education and keeping your skills sharp.
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Buzzle is another good platform for publishing articles online that will rank competitively to other publishers and websites with authority. Buzzle can be used effectively for article campaigns to get good results with long-tail seo strategies. Audiences clicking-through an article to a client website are all considered qualified leads, and typically have much higher conversion rates than do the audiences responding to click-through ad campaigns. Free to use, editorial guidelines apply.
Buzzle is another good platform for publishing articles that you can use to competitively rank in search engines with with long-tail seo stratgies. Free to use, editorial guidelines apply.
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Ezinearticles is a nice format for publishing seo articles online, however their editorial standards are way too strict for most companies. High PR and good backlinks make it worth trying to get your material published, even though it takes several days, to weeks with edits, revisions and rewrites.