I haven't used this site personally yet, but I've come across writers who make good money here. One writer, Allison Whitehead, who has written about her experience at Helium.com, says that she made $550 over the course of a few months. Another writer, Keesa, explains in the Constant-Content forums that she makes a living just by writing three articles per day for this site. However, you need to be able to produce quality, error free articles to even get your work accepted on this site, and your name will not be included with your article.
It will also be to your advantage if you can write on computer-internet related topics, or on popular topics like business or health. Once you sign up, you will be able to see requests for particular kinds of content, and see what articles have been selling recently.
http://www.constant-content.com