Did you know that by 2017 ecommerce will account for 10% of all U.S. retail sales? Or that ecommerce sales are expected to hit $262 billion in 2013, up 13% from 2012 totals. According to research firm Forrester, ecommerce is expected to grow at a compounded annual rate of 10% from 2012 to 2017, outpacing sales growth at brick-and-mortar stores over the next 5 years.