Joel has an interesting piece
Price as signal on why music companies want iTunes to have multiple price points. He says that the real reason for demanding this is so that they (music companies) will have greater leverage when negotiating with artists.
According to the referenced Forbes article,
The dispute over pricing is one of the reasons that Sony BMG has stayed out of Apple iTunes offerings in Japan and Australia
Must say that I had never given a thought to why all movies are sold at a standard price before reading this article.
