There is an excellent set of articles on the challenges pornography presents to Christians striving to live “soberly, righteously and godly in this present age.” The articles provide a broader definition of pornography that more appropriately describes the lustful images, stories, music and words that surround us. The site is at http://www.cvillechurch.com/TheChristiansBattaleAgainstPorn.htm
Spend time investigating the rest of the site for great articles on a variety of subjects. I would also recommend signing up for their newsletter. It always features a variety of interesting articles.