MongoDB 2.2 database added.  Please make note of these credentials:

       Root User: admin
   Root Password: xN-wdh_KI38A
   Database Name: book

Connection URL: mongodb://$OPENSHIFT_MONGODB_DB_HOST:$OPENSHIFT_MONGODB_DB_PORT/

You can manage your new MongoDB by also embedding rockmongo-1.1
The rockmongo username and password will be the same as the MongoDB credentials above.