On December 1st, Apple had officially via a sign at the location of Apple Store in New York's Grand Central Terminal announced that the doors to the grand store will open on December 9th.
Apple has also now created a special page on its retail web site notifying the opening of the Grand Central Terminal Apple Store:
Apple Store, Grand Central
45 Grand Central Terminal
New York, NY 10017
Mon - Fri: 7:00 a.m. - 9:00 p.m.
Sat: 10:00 a.m. - 7:00 p.m.
Sun: 11:00 a.m. - 6:00 p.m.