In this post, the Chief Coffeeneur describes the map that is being used to track locations for this year's event.
And here in his fine blog about biking around the neighborhood, Daniel describes the process by which he is accumulating the information and creating the map.
In the category of when worlds collide, this collective activity has much in similarity with the Connected Courses event in which I'm participating over here. Both involve a loose collaboration among a set of interested participants, where communities are defined with links and hashtags. This one here is about riding bikes and going for coffee!