I RECENTLY ATTENDED A HOLIDAY FESTIVAL AT MY SON'S SCHOOL. THE PROGRAM THE CHILDREN CREATED CONSISTED OF A MICROSOFT POWERPOINT PRESENTATION THAT SHOWED IMAGES OF ALL 50 STATES, COUPLED WITH THE STUDENTS SINGING A MEDLEY OF "OKLAHOMA," "NEW YORK, NEW YORK," "CALIFORNIA HERE I COME," ETC. THERE WASN'T A BULLET POINT, OR A DRY EYE, IN THE HOUSE. THE EXPERIENCE LEFT ME THINKING ABOUT POWERPOINT, AT TIMES A PRESENTER'S FRIEND — AND FOE.