Bakers Delight are having a fundraiser on April 9th, called 'Bundraiser', in which $1 from every pack of hot cross buns sold will go towards Starship's Air Ambulance Service. This service does a great job airlifting sick children from around the country who need specialist treatment, so if you're planning on buying some buns, make sure you do so on the 9th.
I can help you out with a $5 voucher; I've got 5 to give away. You can just leave a comment here; tell me how you like to eat your hot cross buns and I'll do a random draw on Sunday. Make sure I can reach you, so leave an email address if you're not on Blogger. It's only open to NZ residents, sorry, but I know they're running a similar promotion in Australia at the moment. Check out their website or Facebook page for more deals.