With millions of Americans still eager to get into the housing bonanza,if s no wonder signs of overheating are popping up.At building sites from Florida to California,househunters stand in line just for the chance to buy a home.Investors are flipping properties almost overnight.For some lucky folks,home values have doubled in five years.And in early 2005 the boom was in full swing.New-home sales surprised many economists by jumping 9.4% in February,to an annual rate of 1.2 million.And starts rose to a yearly pace of 2.2 million in the month,a level not seen consistently since housing's go-go 1970s.
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