Greywolf did a post recently about article submission sites such as PRWeb and Ezine. It actually ended up being more of a survey on the subject. I have always felt that an article on one of these sites only helps if it gets outside of the predefined content network. I also try to have a slightly altered version of the content on my own site to make sure that I don’t get dinged for duplicate content. Another advantage of doing this also helps to establish my site as the link point if it is picked up by bloggers. However, this stuff only works when you actually have something newsworthy to submit.