[Openbazaar](https://openbazaar.org/) is a very promising application and use case for Bitcoin. 

The graph provides insight into the current user base.  
https://i.imgsafe.org/4008128808.png

Shown are items listed on https://duosear.ch/ for sale (physical items and online items only). 

It will be interesting to watch how this picture changes over the coming months.

The top ten countries are
https://i.imgsafe.org/4018f99aaa.png

There are also significant listings of Digital Goods and Services not included above. 
This analysis does not take account of where the goods are sold but just where they originate. The data has been sourced from the duosearch website.