I am planning on getting in on the devtome action myself. I looked at some of the articles about psychology, science, and medicine... they're not really looking too hot. I would like to apply my expertise (neuroscience PhD student) towards fixing these up... and earning some money to pay some rent. Cheers.
It's best to write your own articles on devtome rather than fixing other articles up. Only the original writer of the article gets paid, that writer could choose to pay you for your contributions:
http://www.devtome.com/doku.php?id=earn_devcoins_by_writing#contribution_etiquettebut it's not required. After you write your own articles, you can also earn devcoins by marketing:
http://www.devtome.com/doku.php?id=earn_devcoins_by_marketing