Wendy Leigh Christensen, 20, a public relations and communications major at Cal State Fullerton, has won the 1990 Miss Long Beach Pageant . . . Bertrum M. CeDillos, chairman of First California Corp., has been named chairman of the board of trustees of St. Francis Medical Center Foundation in Lynwood . . . Virginia Drew, owner of Life Savers Communications and president-elect of the Women's Council, was named Woman Entrepreneur of the Year at the Minority and Women Business Development Conference in Long Beach.