I have run across three up-front pay writing sites that you may be interested in. I have never written for these sites myself, but I have read other writer's reviews about them and the sites all sound legitimate. If anything, you can always apply and see if they are sites you'd enjoy earning money at. The three sites are:
If any of you have experience with these writing sites, or you do join, leave a comment so we all know how they are.
DeannaMore Articles of Interest:
Writing Site: Constant-Content
Daily Article: Writing Site Review