Just saw this on Slash Film, a documentary about the "disappearance" of John Hughes, who essentially retired from Hollywood after directing Curly Sue in 1991. The film, Don't You Forget About Me, follows for Canadian filmmakers as the travel from Toronto to Hughes' home of Chicago to try and track him down. The movie is loaded with interviews with former cast members and other filmmakers who've made teen flicks (Jason Reitman, Kevin Smith) but I suspect they never did speak with the reclusive Hughes, as he doesn't appear in the trailer. It's a shame he died before this came out... seems like a Hughes love-in.
Update: The film has officially been picked up, with Canada's Alliance Releasing securing the rights. No date has been set for its release, yet.
More details at the movies official site.