CNN has an interview with "Beatles Anthology" director Bob Smeaton, who directed the mini-documentaries that come with stereo versions of the remastered Beatles CDs.
One very interesting tidbit:
Originally what happened was, the albums were going to be released on iTunes but that deal, you know, fell through for whatever reason. Some sort of political reason. So we actually set about creating a mini-documentary for each of the albums, so that when you bought the albums on iTunes, if you bought the whole album, because on iTunes you can pick like one song, right, if you bought the whole album, as an incentive to buy the whole album rather than just to cherry-pick songs, you would get this mini-documentary.