Here Ed Dale advises you to search for other Web 2.0 competition that may be competing for the same search phrases and keywords as you. If you find sites like Tumblr blogs, Ezinearticles, Hub pages, Digg pages and Squidoo lens's then you may need to add more content to your own Web 2.0 pages to compete.
How to use Bloglines to find relevant blogs to maximize your niche research and understand a topic quickly and easily.