For anyone interested in joining a NFL Pick 'Em League, I created a group on ESPN.com. After you create your entry, go to "join/create group" and search for "Josh's Pick Em Party 2K13" and use the password: yayfootball. If you need help finding where to go, let me know.
Here's a link to the NFL Pick Em front page to help get you started - http://games.espn.go.com/nfl-pigskin-pickem/2013/en/