There are several sites on-line where people have set up controllable Halloween decorations for various causes. Alek’s Halloween site is a little crowded but that’s part of its charm. He’s been doing it since 2005, has a Google map of the people who have participated, and all the decorations are wind-powered. Halloween Addict has a 2008 link to a “This American Life” podcast about a guy who maps Jack O’Lanterns in his NC neighborhood. Finally, A&E’s Paranormal States and Unexplained Mysteries provide the most comprehensive maps throughout their sites of any I have found on-line so far.