Sometimes you just want to search for a product on a retailer's Web site from the comfort of your touchpad or keyboard, and click "add to shopping bag" without having to get in the car and drive 30 minutes to some local boutique, Bloomingdale's, Nordstrom or Neiman Marcus. If the shoe I am searching for is out of stock, I might pull up a browser and search for it on Google Product Search, now known as Google Shopping, to see if I can find it elsewhere.