I've just seen this film, which came out last year, and really enjoyed it. The script is taken from Ginsberg's collection 'Howl and Other Poems', from transcripts of interviews he gave, as well as the obscenity trial in New York, all linked together with some amazing passages of animation. It's a long time since I read Howl, and it made me want to pick it up all over again. It also seemed to fit with a book I've just been reading - Joyce Johnson's Beat Memoir 'Minor Characters'.
For more poetry please go to the Tuesday Poem hub, at www.tuesdaypoem.blogspot.com