Air New Zealand is looking for a few bald-headed frequent fliers. It’s all part of the company’s new advertising venture. The airline will pay $666 a head to 50 passengers willing to work as “cranial billboards” and use their shiny heads to publicize a new speedy check-in service. The airline will hold auditions next week. Winners will be shaved — if necessary — on the spot and branded with a temporary tattoo advertisement.