I recently launched a free blog post search service at FindBlogPosts.com. I have been using the tool myself for months and found it to be very effective so I decided to release it to everyone, free

What does it do?
The site allows you to search through millions of WordPress blog posts for articles related to your site to comment on. Blog commenting is a great way to build backlinks and traffic (especially if the articles are related to your niche). Manual commenting has shown to be much more effective than auto commenting and this tool makes it really easy to find hundreds of blogs in any niche.

Blog Posts about auto insurance
Blog Posts about netbuilders
Blog Posts about affiliate marketing

Just some ideas. Please take a look and let me know if you have any questions or suggestions