For some reason (increasing public interest? coincidence? conspiracy?) several documentary films have been produced in the past year or so about some of the major figures in outside music, with more on the way.
"dErailRoaDed: Inside The Mind of Larry "Wild Man" Fischer" - Now on the film festival/art-house circuit. Watch the trailer featuring Frank Zappa and Mark Mothersbaugh.
"The Devil and Daniel Johnston" - Also currrently on the festival circuit. There are clips from the film on the site but I couldn't get them to work.
"Bruce Haack: The King of Techno" - Out now on DVD. Watch the trailer (he appeared on "Mr Rogers"?!)
"You're Gonna Miss Me" - about Roky Erickson. Can't find a site for the fim, but here's a review.
Although there was a stage musical about The Shaggs, the film, a fictionalized "bio-pic," as they say in Hollywood, has been delayed (in "turn-around," as they also say.) Tom Cruise (?!?) was once interested in making a film about The Shaggs.