Here is one of the best SB Nation features. It's the ability for all of you to post your own mini-blogs on the sidebar for all to read. You'll need to create an account to do so.
After you do that, just click "Post New Diary" in the top right box of the site and rant away. Diaries have a 300 character minimum and are HTML enabled.
Feel free to talk anything sports related. Have a crazy trade idea, post a diary. Can't understand why the Knicks are giving Jared Jeffries 30 million dollars, post a diary. You can even add your own polls. The more you post the better the site becomes, so go nuts.