Until February 27th The Good Guys have a range of bonus offers accross the Mac range as well as the iPad 2 range.
Mac iTunes Card Offer
Purchase any Apple Mac Computer and you will get a bonus $50 iTunes Card.
Get a bonus $100 iTunes Card by purchasing any Mac with AppleCare extended warranty plan.
iPad 2 iTunes Card Offer
Buy a Apple iPad 2 with Apple Care extended warranty and you will get a bonus $50 iTunes Gift Card!
Offers vary from store-store with The Good Guys so please check your local store first to ensure they stock Apple products and are running the above promotions.