They're worth a combined $45 billion, a new record. South Korea's economy is quickly recovering from the recession thanks to rebounding domestic demand and favorable export conditions. So, too, are its wealthiest citizens, who got a boost from a strong won, which is up 20% in the past year (their fortunes are measured in U.S. dollars). The nation's 40 Richest are worth a record $45 billion, up $18 billion from last year and $4 billion from the previous 2008 record.