Apple's Core i5 / i7 27-inch iMacs now shipping to expectant owners: Apple has begun sending off shipping confirmations to customers who ordered up their slab of quad-core all-in-one nirvana in October, and the biggest and baddest iMacs should be arriving at their new homes imminently. To remind you, the reason for waiting on these units was the 2.66GHz Core i5 750 inside, which comes along with 4GB of RAM, a Radeon HD 4850, and a cool terabyte of storage. We're sure some of the eager new owners couldn't resist upgrading that spec to a 2.8GHz Core i7 860, which we can kind of see the sense in -- after all, an iMac is for life, not just for Christmas.