With all those millions of Facebook and iPhone users tending to virtual crops and sharing them with friends, have you ever wondered how their toils stack up against actual real-life farmers? How does our output of digital (and decidedly less tasty) tomatoes compare with our worldwide production of real tomatoes? And perhaps most importantly, who are these casual croppers, and are they anything like their plow-toting counterparts? We broke it down by the numbers and put some of these FarmVille trends in perspective for you. Click image for larger version.