It's always telling what the social currency of any large industry gathering is. This week's hedge fund confab in Miami's posh South Beach stretch drew thousands of fund founders, institutional investors, lawyers, marketers, data providers, and more. In recent years, as Miami, Palm Beach, and other South Florida hot spots have gained traction among the wealthiest New Yorkers and Californians, attendees might boast about looking at properties while in town as they weighed moving. This year,