As you probably know, backlinks play an important part of any organic marketing campaign.
You can study the backlinks of your competitors and easily copy some of their hard work. It's one of the reasons why SEO marketing is so democratic. If you really want to take over a rankings for a certain terms, you can do so if you just have the consistency and the discipline.
It even tracks the number of links from different C-blocks to specific pages, which for SEO geeks is pretty cool.
(A cool little tool like this to spy on your competitors just makes it much easier.)