Last year, as shoppers carefully crafted their game plans for Black Friday, visitors to the Best Buy website were greeted with the following message: "Our site is incredibly busy! Please be patient while we shovel you a path."   So, not only were consumers unable to peruse the site’s doorbuster deals, but investors, too, were unable to boost their already waning confidence in the underperforming electronics retailer.   Best Buy was, of course, able to bounce back – the issue happened...