The official website revealed the details of Black★Rock Shooter anime.

Black Rock Shooter official website

Duration: 50min

Cast
Kuroi Mato: Hanazawa Kana
Takanashi Yomi: Sawashiro Miyuki

They will conduct a PR campaign of the anime from June 25th - August 31st, and the whole movie will be provided for free during the period.

Examples of the campaign:
1. free online streaming
2. preview events
3. free distribution of the DVD

According to the official twitter of character goods maker COSPA, they will secure the profits by the sales of the Blu-ray edition and the special package.

Source: Akibablog's twipic, Cospa's official twitter

Updated on May 18th
According to Precepe news, the release of Black Rock Shooter DVD was postponed until July 24th. A preview will be held in Akihabara on July 7th.

Source: Presepe