Updated Guidelines for Link Schemes
An updated warning and explanation from the Google Content Guidelines. My take away...play by the rules or be penalized. In summary: "The best way to get other sites to create relevant links to yours is to create unique, relevant content that can quickly gain popularity in the Internet community. The more useful content you have, the greater the chances someone else will find that content valuable to their readers and link to it." Read full article: Updated 10/02/2012 http://support.google.com/webmasters/bin/answer.py?hl=en&answer=66356