It was a little bit involved and requires some programming skill so maybe it's not for everyone. The good news though is there's a much easier way to do it that is also more customizable than the rakeback widget I have on my blog's sidebar.
The rakeback site Full Rake Tilt offers two options for adding rakeback offers to your blog depending on if you use Blogger.com or a WordPress powered blog.
You'll receive anywhere from 2-4% of the MGR (monthly gross revenue AKA rake) that all the players you refer generate. The players will receive a portion of their rake back in addition to special bonuses, promotions and freeroll tournaments.
Not a bad deal for something that takes only a minute or so to set up. Just be sure to create an account and include your username when you set up your sidebar, as explained in the following instructions.