Burying a negative blog post

Hi

3 years ago someone wrote something uncomplimentary about a friend of mine, using his name in the Title (and repeatedly in the body) of a blog post (on a free blogspot blog).

The comment isn't libalous its just along the lines of " Jon Doe is a "@** " . The problem is it's the first search that comes up and in a recent interview it was mentioned so its not funny really and I want to help him bump it off the first page at least.

The blog hasn't had new content added to it in 2 years - though the blogger had been quite active when he was maintaining it over two years. There are no external backlinks to the post but there 200 internal backlinks, the page has a 2PR. None of the serps under this negaive first result are blog links

My friend has many other listing on social networks (linkedin, facebook etc) but this post always lands first in the SERPS - he doesn't know how long this has been the case as he has never checked his own name online.

Over the past 5 days I have been building backlinks using dofollow links with his name as the anchor text and linking to the positive url's under the negative one. I have used social network profiles, yahoo/google bookmarks, rss, images and comments on high pr dofollow blogs. I have created a blog with his name on wordpress mu, live Journal and Blogspot.

The negative comment has now moved off the first serps page on my country specific google search but is still first on google.com

Can anyone make a suggestion about how to get this post off the first page Google.com?

Many thanks