Even in tough economic times the wealthiest Harvard grads are prospering. Over the past year the number of Harvard alumni who are billionaires swelled to 62, up from 54 last year, more than any other American university by a long shot. Talk about good connections: A significant number of these 10-figure titans were classmates. New York Mayor Michael Bloomberg and oil and banking tycoon George Kaiser graduated from Harvard Business School in 1966, while hedge fund chief Bruce Kovner received a B.A. that year and private-equity kingpin David Bonderman a law degree. Meg Whitman of eBay ( EBAY – news – people ) and subprime short winner Jeffrey Greene graduated from the business school in 1979, while Apollo Management’s Leon Black and Hamilton James of Blackstone earned M.B.A.s in 1975. Speaking on the condition of anonymity, a billionaire M.B.A. alumnus told Forbes that the business school’s system of dividing the student body into sections afforded A+ networking opportunities: “You leave with 120 close relationships.” He says he’s still in touch with most of his section mates. – from Forbes