Costco (NASDAQ: COST) seemed to mostly ignore its online business until the start of its current fiscal year, about six months ago, when CFO Richard Galanti began devoting more time to explaining its e-commerce efforts during the company's quarterly earnings calls. For the 12 weeks ended in mid-February, Costco same-store sales were up 3% in the United States, 2% in Canada, and 3% internationally (when you factor out the impact from changes in gasoline prices and foreign exchange). What is Costco doing?