I need a copywriter to fluff up some text for SEO on a website.. but it's not in the list of things on offer, and I'd happily $12 an hour for that kind of work.
I run SEO services & have been using this new startup mediapiston.com as the content provider. I have had good experience so far. They have excellent review process where each article goes through 3 reviewers before it is submitted back to the requester. You can possibly try such a service.
As far as the author, programming & design work would get best rewards and in single chunk.