Here is an oldie that should brighten up your day. Overplot last featured on Google Maps Mania over four years ago but is as funny as ever.
Overplot maps funny conversations overheard in New York and posted to Overheard in New York. Each conversation posted has a fairly precise location attached so Overplot is able to display the conversations on a Google Map of New York.
If you are interested in how the map was created there is also a lengthy explanation at persistant.info.