I'm not sure just how much juice this will give since I just did this a few minutes ago. However I just had to make a post in case it pans out. Go to msnbc.com Find a news article that appeals to you. Read said article. Hit the post a comment button. Choose the log in with Face Book option. Go through all the options and cut out your Face Book link. Add a link to one of your sites Hit submit Post ! Maybe, just maybe this will give an authority type link.