Automatic Backlinks - Link exchange system with free backlinks: "Automatic Backlinks is a new service that is set to revolutionize the concept of link exchanging for web masters. Your links are automatically placed on up to thousands of sites simply by displaying links on your own pages.
Our system works on the basis of "Link Credit". The more links you display on your own pages, the more credit you'll earn and the more backlinks you'll get. Higher PageRank pages will earn even more credit, translating into even more backlinks!"