Doug Block, who you may remember was the director of Home Page (a documentary about online life circa 1997, featured Justin Hall), has a new documentary coming out called 51 Birch Street. The film is an examination of Block's family begun after his mother died, his father quickly remarried, and Doug began to wonder how well he really knew them to begin with.
Update: David Hudson saw 51 Birch Street at SXSW and liked it.