I just came across this and thought others might be interested. I did the download and have just started reading through parts of it, but so far lots of interesting facts and tips on little things to look for throughout the parks. According to the press release, the download is free from www.notescast.com and also available for .99 from iTunes.
http://pr-usa.net/index.php?option=com_content&task=view&id=233804&Itemid=33
http://pr-usa.net/index.php?option=com_content&task=view&id=233804&Itemid=33