This is billed as the <strong><a target="_new" href="http://www.emomsathome.com/blog/2007/04/04/the-worlds-largest-blog-niche-and-topic-idea-list/">World?s Largest Blog Niche and Topic Idea List</a></strong> and was Written by Wendy Piersall at the eMoms at Home blog. I don't think it's the worlds biggest list, but it's a good one and you just may get some new ideas about niche marketing or blog topics to focus on.