Apple's Black Friday shopping event is underway is Australia, and may give US buyers a strong indicator of the kind of discounts the company will offer North American buyers tomorrow. Apple has discounted the entire MacBook line -- including MacBook Airs and MacBook Pros in all configurations -- at $105 off the normal retail price. The current fourth-generation iPad is being sold for $41 off in all varieties, with the iPad 2 seeing a $31 discount. The latest iPod Touch has been reduced by $31 as well, with the previous-generation Touch going for $25 less and the latest iPod nano selling for $1