Now that he can no longer be a frontman for cigars — which are bad for the heart — David Letterman is being pursued by (are you sitting down?) ostrich producers. The American Ostrich Association wants the Davester to promote their product, which the group says contains less fats than the other red meats. To get Dave to eat right, the ostrich people are ready to donate a year’s supply of ostrich meat to the “Late Show” host, who’s currently recovering from his quintuple heart bypass. They also want to give him lessons on cooking such delicacies as honey-glazed ostrich shish-kebabs and ostrich and tortellini soup. So far, there’s been no word from Dave’s camp on the offer, but would this mean he’d no longer toss canned hams to his audience?