(Without electricity, a car, or a cell phone, Amos Miller turned his dad's Pennsylvania farm into a $1.8 million national food retailer) Imagine trying to build a national food retailing business based on mail order, far-flung distributors, and trade shows—without using the Internet. No e-mail newsletters or Web site for taking orders and handling complaints, no Facebook fans, or Google (GOOG) ads, or Twitter following. That's not all. Imagine doing it without using cell phones or computers. No BlackBerry for expediting orders. No CRM software for segmenting customer lists. Absolutely no texting. Let your imagination go a little further and...