PRESS PHOTO BY PAUL WILLISTEINAl Jacobsen, right, newly-appointed Allentown Symphony Association Executive Director, with George Li, left, piano soloist for the Grieg “Piano Concerto” with the Allentown Symphony Orchestra for the “2001: A Space Odyssey & Grieg” Sept. 22 and 23 concerts that opened the classical music season at Miller Symphony Hall, Allentown. Jacobsen was introduced to Symphony