See https://github.com/docker/stackbrew for the process by which official images are made and maintained. The reason we made our own “golang” image is that the only person we could get interested in doing such a thing from Google was proppy, but he was too busy with other stuff to respond and actively maintain such a thing. We’re definitely not opposed to Google taking it over, as long as they actually actively maintain it.
For example, the CentOS Rel-Eng team maintains the official “centos” images now, and we’ve got an active upstream Perl contributor maintaining the “perl” images, which is also cool. I think it’s important to note that we’re not trying to step on anyone’s toes - we need quality content, no matter who maintains it, and we’re not opposed to turning that burden onto upstream if they can maintain.