The MacMall.com 72 Hour Apple Black Friday Sale is now live and takes up to 25% off select Mac systems, including the MacBook, MacBook Pro, iMac, and more. It's one of the most aggressive Mac discounts we've seen from any seller, with several price lows, although most deals require a mail-in rebate. Shipping starts at around $4. Sale ends November 28 at 3 am ET. Notables:

• Apple MC238LL/A Mac mini Core 2 Duo 2.26GHz Desktop for $549.99 via $25 rebate
• Apple MB950LL/A iMac Core 2 Duo 3.06GHz 22" Desktop (pictured) for $1,068.99 via $100 rebate
• Apple MC233LL/A MacBook Air Core 2 Duo 1.86GHz 13" Notebook for $1.398.98 via $50 rebate
• shop the entire MacMall.com 72 Hour Apple Black Friday Sale