Examples of PSAs:
National Crime Prevention Council http://www.ncpc.org/
Ad Council http://www.adcouncil.org/default.aspx?id=15
The American Red Cross http://www.redcross.org/press/psa/psa.html
Your Brain on Drugs http://www.youtube.com/watch?v=nl5gBJGnaXs
Listen Up http://www.listenup.org/
