Okay. I know I'm slow on this news but I still have to post it.
It was announced that a 50min video will be available for free streaming from June 26 to August 31.
It is not known if anyone outside Japan is able to stream the video. Then again, if someone can put it up, someone will sub it and bring it to us.
Hooray for Black (Star) Rock Shooter!! Here's a pic: