Smule Sonic Lighter
Smule Lighter is a virtual lighter for the iPhone, which seems to be taking the world by storm. To get an idea what this iPhone application does check out this YouTube demonstration video:
Apparently one of the reasons that the application is proving so popular is that when you light the flame on your iPhone your location appears on this map.
Smule ranks the cities of the world by the number of 'kilojoules' burned each day. Currently Tokyo is leading the way with over 1000 'kilojoule's'. Since its launch on the 15th September there have been 68,514 unique ignitions representing 3,977 unique locations across the globe.
Which just leaves the question - Why?