These links are part of a pay per click advertising program called Infolinks. Infolinks is an In Text advertising service: They take my text and create links within it. If you hover with your mouse over these dotted underlined links, you will see a small dialog box containing advertisement related to the text marked. You can choose to either move the mouse away and go on with your browsing, or to press on the box and go to the ad page which is relevant to the text. Click here to learn more about Infolinks Underline Link Ads. You can switch your dotted lines to be different colors and to be underlined twice or dotted. Some people find these ads to be annoying, so you will have to weigh out whether or not the money you make from them in worth it or not. You can edit the amount if any links go on each post. I am in a “testing phase” to see if it is monetarily worth it. So far as of 4/24/2011 I am averaging about $10 a month.