Walmart's Black Friday will start online at 10 p.m. ET on Wednesday, two hours earlier than previous years. The in-store event will begin at 6 p.m. local time on Thanksgiving Day. For shoppers arriving at stores between 4 and 6 p.m., Walmart will hand out 4 million cups of coffee from Keurig and 2 million Christmas cookies from its bakery. More here.