If you are in need of some articles written for anything including niche websites one easy way to get articles is through Need-An-Article. They charge $5.52 for a 550 word article so approx a penny a word.
One thing I really like about them is that your satisfaction is guaranteed. So if the article is not how you wanted it, you can have the writer re-do it and if it is still not how you wanted it after that then someone else will write it at no extra cost to you. That is always a nice fall-back if you find yourself without the time to write your own articles.
They are also much better than paying someone on elance that you don’t know and are not even sure if you will get the articles you are paying for. You are guaranteed your articles and your satisfaction.