There's a long Bloomberg article, webbed by Business Week, that discusses spin-offs from the gold boom. First mentioned is prospecting: not only have the number of members of the Gold Prospectors Association of America gone up 93% in 2008, but also a fellow has set up a thriving business teaching people how to prospect with an adventure-vacation format. Also, sales of prospecting tools are booming. So are safes; so are gold vending machines, the latter being an idea that's caught fire. Interestingly, so is gold insurance.
[Gotten from Superior Gold Group, which has a summary of its own.]