iTMS: the best place to advertise?

According to www.AdAge.com, Apple is currently evaluating the possibility of opening the lower left corner space to advertising contents.
Podcast would be the first to receive such visual component in addition to the audio ads usually present in a Podcast.
If the user reactions are not too negative, it might even be extended to the entire services available on the iTMS...
For sure, most iTunes users will not be very happy to see a non-solicited video advertising content appearing on their window...