Hey guys,

I'm working on a study at MIT with the goal of doing an economic analysis of the Bitcoin marketplace. Do any of you know of existing existing resources/projects/studies that:

1. compile known merchants/services and the public keys associated with them

and/or

2. map known public keys to geographic regions (cities, countries, etc)

I think it would be pretty awesome to study not just the growth of bitcoin as a whole, but specifically the growth of bitcoin in different sectors (gambling, financial services, consumer goods, etc) and different regions. Thanks! Any input would be greatly appreciated.