We're going to be delving into questions about polling quite a bit here at Public Eye, in order to give readers a better sense of why the polls come out the way they do. We've already posted a poll question here about how people rated media coverage of Katrina. Now we want to share with you this introduction to polling issues, written by the CBS News polling unit, which addresses some frequent questions about CBS News polls. You can click here to read it. And stay tuned for more polling items from PE in the coming days.