I was hoping to find something on the Web, but I haven't been able to find a simple "Top Ten List" of the world's most traded commodities. I once heard that coffee was #3, after oil and illicit drugs. I have no idea if that has any credibility. I do know, however, that coffee is up there. Starbucks is big, but it only represents a tiny fraction of the world coffee market. Most of it is just regular old canned coffee, I think.

I guess I haven't figured out exactly how to search for this list yet. I saw oil, coffee, sugar, cocoa, rubber, wood, grain, and steel recurrently in my search.