The film that is of most relevance to this site is Pasolini's La Ricotta in which a movie director makes a film about Jesus's death. The film was deemed so irreverent that Pasolini was initially sentenced to some time in jail. Shortly afterwards he released the far more reverent Il Vangelo Secondo Matteo (1964).
La Ricotta, with out the other three sections I believe, has been available on DVD since 2004 when it was released as an extra on the Criterion Collection version of Pasolini's Mamma Roma. (The director character - played by Orson Welles - reads passages of Pasolini's book "Mamma Roma" during La Ricotta).
However, the entire anthology is to be included in a boxed set of Pasolini's films which is to be released on 26th February 2007. The set will also include Accattone and Comizi d'amore (Love Meetings). Sadly, Il Vangelo Secondo Matteo is not included in the set. I long for the day that film gets the full treatment and not only gets released with the option to remove the subtitles, but also with La Ricotta and Seeking Locations in Palestine for The Gospel According to St. Matthew (which Peter Chattaway also makes some comments on). This set is actually only volume 1. A second box set will be released on the 23rd April featuring Hawks and Sparrows (1966), Oedipus Rex (1967), and Pigsty (1969).