Wal-Mart (WMT) bargain hunters that want Apple's (AAPL) iPad 2, an LCD TV or Blu-ray player are in luck. The world's No. 1 retailer is guaranteeing customers that wait in line during an event on Thanksgiving Day will be able to buy the items. Wal-Mart is opening its doors at 8 p.m. on Thanksgiving Day, two hours earlier than in 2011, to accommodate all the holiday shoppers. Between 10 p.m. and 11 p.m. customers can buy the Apple iPad 2 with Wi-Fi