To put the readers in correct perspective; buildmyrank was a site which had a group of its sites and webmasters used to pay them to join and write for them and they would allow you a link per 150 words.
Now Google has come very heavily on it as it has downgraded the group of sites making Buildmyrank. Thus if you are not doing SEO, you need not worry as Matt Cutts has stated that Google is going to make its bot smarter which will make it very difficult for the webmasters to manipulate the rankings in any way.
This is good for all the webmasters who were using the white hat techniques for search engine optimisation. Be on the right side of Google as the giant of search engine technology is watching you.