Try www.atlantaShuttle.net , This Airport shuttle company is serving Metro Atlanta Suburb cities along Interstate 75 and 575. That includes Marietta. Kennesaw, Acworth, woodstock and Canton. I am curretly using theiir service from ATL Airport to Kennesaw and back on a weekly bases they are very good. Their price is reasonable $65.00 each way 90% of the time I ride their big van by myself becase they do not have other customers to share ride . If Shared the same ride can be as low as $45.00. One of their drivers told me they are trying to build a customer base so that the price can go as low as $30 to $35.00/person.