The first OSSI satellite will piggyback ride to Soyuz 2.1b launch vehicle from Russia.
The french company NovaNano played a crucial role to set up launch opportunities for OSSI.
1. wikipedia image of soyuz 2.1a
2. recent images of soyuz 2.1b
Just saw an article on Soyuz 2.1b launcher failure
Do not know how this failure will affect OSSI launch projected on 31 Aug. 2012
The failure happened on 23 Dec. 2011 http://www.bbc.co.uk/news/science-environment-16317099