Apple computers and gadgets rarely get offered at significant discounts. Black Friday (see 2007 Apple Black Friday offers though is one of the few occasion for Apple to slash their prices and offer some great deals.

Update:
Apple Black Friday Deals are on Sale Now
Apple Black Friday Deals Teaser.

According to AppleInsider analysts see Apple offering their biggest Black Friday sale to date amidst price pressure from notebook and netbook vendors.
Last year savings on Black Friday ranged up to $101 for an iMac. It is not that difficult for Apple to beat the rather cautious discounts they offered in 2007.
The Apple Black Friday Sales are supposed to launch at mid-night on Thanksgiving Day.
See also the Apple Store.