Another idea is to send your articles in bulk - not a solution for all sites (I've only seen two so far out of those 20 or so top article directories. It would be useful, such as when you do a marathon of converting a book you wrote (idea, here?) into a massive set of articles.
If you were to do your ten articles a week right at the beginning, then submit them in bulk to perhaps five article directories (watching to ensure you don't then have your article submitter program try that again) .
Just an idea to make your article submission more prolific...
ArticleCity.com - Submit Your Articles in Bulk