Cobain: Montage of Heck television premiere is on May 4th on HBO. It's directed by Brett Morgen, who also directed the excellent documentary about Robert Evans, The Kid Stays in the Picture.

http://feeds.boingboing.net/~r/boingboing/iBag/~3/xJQXNGXKd_Q/trailer-for-upcoming-kurt-coba.html