As Hong Kong’s glitzy hotels play host to ever more wine auctions, with furious paddle-waving and Asian bidders showered with samples of expensive bottles, a new battle for sales is taking place online. Anonymous bidders, identified by screen names like “LAFITE4EVER” (referring to Asia’s favorite, Château Lafite-Rothschild) are buying from the near-constant Internet-only sales offered by the likes of Acker Merrall & Condit, America’s oldest wine shop, and California-based Spectrum Wine Auctions.