The mounting pressure from 18 days of historic protests finally drove Egyptian President Hosni Mubarak from office, after three decades as his nation's iron-fisted ruler. But over that time, Mubarak amassed a fortune that should finance a pretty comfortable retirement. The British Guardian newspaper cites Middle Eastern sources placing the wealth of Mubarak and his family at somewhere between $40 billion and $70 billion. That's a pretty good pension for government work. The world's richest man--Mexican business magnate Carlos Slim--is worth about $54 billion, by comparison. Bill Gates is close behind, with a net worth of about $53 billion. Epic skimming is a common privilege of Middle Eastern despots, and Mubarak and his two sons, Gamal and Alaa, were a bit less conspicuous than some of the Saudi princes and other Middle Eastern royals seen partying from time to time on the French Riviera or other hotspots. The family does reportedly own posh estates in London, New York, and Beverly Hills, plus a number of properties around the Egyptian resort town of Sharm El Sheikh, where Mubarak reportedly went after resigning the presidency.