From the website:
Corum is an online consultation solution for public-facing organizations. Corum leverages the power of social networking to help organizations engage people in purposeful conversations about issues, programs and products. Consultation leaders use Corum to generate actionable results and strategic intelligence from their consultations processes.
As of September 14, 2011, Corum is in private beta.
Update: Corum has been discontinued. In order to access the site, view an archived copy.