The never ending marketing scheme of Black Rock Shooter CONTINUES! This time its a RPG game for the PSP. It is scheduled to be released during the Summer of 2011.
Here's the original teaser video back in August 2010:
Release: Summer of 2011,
Price: Normal Edition: 6279yen
Limited Edition: 10479yen (includes a White Black Rock Shooter Figma and other goodies)
Source: Figure.fm, DannyChoo.com