Thanks for the comprehensive reply kmfkewm, I frequently find useful information in themSome thoughts:1. Is there a good book on the TOR network/anonmity you'd recommend? I can read wikipedia all day but I prefer a book.2. The idea of 'mail geolocation' had occured to me before in combination with the ISPs knowing which IPs are using TOR, but only in a vague way.To surmise it seems the most anonymous route for sellers who are transacting in large volumes is:    A: Be in large population density area.    B: Use a mobile broadband widget (fake ID etc for the ISP guys and prepaid card for the bills) to connect to the internet.     I'm uncomfortable with using hacked or open wi-fi. This is because I would want a solid reliable connection when transacting business. If you know a better way, then say so.    C: Connect to TOR via bridge. (maybe use your own personal proxy to bridge?)    D: Conduct business etc    E: Deliver post at a different location everyday e.g. cover majority of distincts in New York city.What other ideas/refinements would you suggest?3. The TOR cloud thing is here: https://cloud.torproject.org/.