ST. PETERSBURG, Fla. -- As baseball's opening day got under way at nearby Tropicana Field, the Grocery Manufacturers of America's 2003 IS/LD technology and logistics conference took place at The Renaissance Vinoy here (where the visiting Red Sox were staying). Though targeting technology executives at CPG manufacturers, the conference featured retail speakers from Schnuck Markets, Albertsons, Wal-Mart, Wegmans, Walgreen, Hannaford, CVS and Ahold.