The Atlantic said traffic to its flagship Web property -- TheAlantic.com -- increased 57% to 10.3 million unique visitors in August from a year ago, while digital ad revenue was up 47%. Traffic to TheAtlanticWire.com grew 27% to 3.3 million, while TheAtlanticCities.com broke 1 million visitors for the first time after being launched less than a year ago. Digital ad revenue overall is up 52% so far this year. The magazine publisher forecasts it will top last year's performance by more than 40%. The Atlantic didn't provide revenue figures in actual dollars.