Trailer for I Know That Voice, a documentary about professional voiceover work that puts the faces to famous voices like David "Movie Trailer Guy" Kaye, Billy "Fry" West, Kevin "Batman" Conroy, and Tara "Pretty Much All Of Cartoon Network" Strong.
The film doesn't have an official release date, but its IMDb page -- which really comes in handy -- has it listed for 2013.
[vulture.]