This isn't strictly and extension object, as it uses our standard scatter chart overlay to google maps / Open street maps, however I wanted to share! This application contains the ability to use either google maps or open street maps (or to switch between the two). It uses a variable to replace the google maps url with the open street maps url and vice versa, and hooks in with Latitude and Longitude codes.
A big thanks to one of my colleagues in Italy as I had not seen this before they presented it. As support for IE 11 isn't available until V11.2 SR5 - if you get any Js errors, that is likely to be the cause, so check your version of IE first. More information is contained in the app itself.