Boston may be this century's Titletown, but when it comes to the business of sports, no city tops Atlanta. That's according to Sports Business Journal, which anointed Georgia's capital No. 1 in its fourth annual rankings this week. Corporate neighbors like Chick-fil-A, Coca-Cola and Delta support their teams. Falcons owner Arthur Blank founded Home Depot there in 1979 and has never left. The Braves built a ballpark that anchors a development called The Battery.