These are the sites I've written for, and the amount earned to date:
www.bubblews.com - $50.00, but they owe me an additional $75.00 they have never paid. (Jerks!)
www.fullofknowledge.com - zippo. Nice site, but too hard to earn money from.
Write online if, (like me!), you have a psychological compulsion to do so; just don't expect to make a living from it!