It was probably inevitable, with Bill Gates handing out his cash right and left, and Microsoft's stock in pretty much a holding pattern for most of the 2000's, but it's still sad to see our man Bill get knocked off the top spot on the "world's richest" list. His replacement is no stranger to tech though, Carlos Slim built his fortune in the Mexican telecom biz, and has amassed an estimated net worth of $67.8 billion, thanks to a surge in the shares of America Movil.