Possibly prodded by the war ¬between Amazon.com and ¬Diapers.com, ¬shipping fees are going the way of rotary phones. On Nov. 11, Wal-Mart Stores entered the fray, ¬offering free shipping on 60,000 items through the holidays. Best Buy followed suit on Nov. 17. “We’ve noticed a dramatic increase in the number of merchants offering free shipping this year,” says Luke Knowles, founder of Colorado-based FreeShipping.org, which lists sites offering free shipping. “Walmart.com started a small free-shipping war by offering free shipping on electronics and other items. Best Buy, Target, and others responded.” Some of those offers are set to expire in the new year, though Knowles says the number of merchants listed on his site doubled in 2010.