Most GameStop and Electronics Boutiques stores have stated that their regional warehouses have received their shipments of Mortal Kombat: Deadly Alliance. Depending upon regional distribution policies, many stores will indeed have MK:DA available today for pickup if you had preordered your copy in advance, with some stores receiving extras for walk-up sales.
Call your local video game specific store now and ask if they have Mortal Kombat: Deadly Alliance and then post a message in our Release Watch thread.