As this story from TheStreet lays out, customers are upset that their orders - confirmed and paid for - are being canceled by Best Buy.
Here's Best Buy's statement: "Due to overwhelming demand of hot product offerings on BestBuy.com during the November and December time period, we have encountered a situation that has affected redemption of some of our customers' online orders. We are very sorry for the inconvenience this has caused and we have notified the affected customers."