This trick is about SEO and to keep external links relevant. Using whichever sidebar RSS aggregator you wish, use the feed from the search to parse out headlines into your blog sidebar. Only use headlines, do NOT produce full content. Author of this post continues to climb, feed subscribers continue to grow and his Technorati ranking is approaching 2000.

One of the rules of SEO is to keep external links relevant. That means that if this site is about blogging and new media, links to sites discussing blogging and new media are better for me than links to sites about… cats. The other unwritten rule is that every blogger who uses WordPress looks at his dashboard for new inbound links. Of course, there’s the Google search or Technorati search that can do the same thing, but WordPress users have it easy and new inbound links are listed in the dashboard for easy reference.

You can read this post here
How to Enhance your Blog’s SEO and Attract Relevant Traffic in One Easy Step and also share your opinions with other readers.

Good luck with this trick, i will test it on my blogs, also here on SEO For WordPress.