Apple has been working to expand its iAd team over the past month, posting job listings for dozens of positions just as the company prepares to launch its iTunes Radio streaming music service, notes Ad Age. Apple's iAd team is handling advertising for the new service and has reportedly already signed up a number of high-profile brands to advertise on the service from its launch.Apple had posted five iAd-related jobs to its own job board and another 35 to LinkedIn just in the month of August as of Friday. The openings are for a variety of jobs including account coordinators, ad design managers, project managers and engineers who will create n