How does it work:
-Typ in the box 'keyword' your website subject or keyword.
-Choose in the box 'choose link' the kind of link you are searching for.
-Hit the search button, you will be redirected to Google, on all the sites you see in the search results you can drop a message with a link to you website.
-Place a quality message (no spam) on a website with your link.
Google sees this a high quality backlink, you will also get more traffic because people will see your messages on the sites you posted on.
TIP: install SEO Quake for faster and higher quality backlinking and please dont spam!