This means that a Gold Master has been released to the CD plant for replication. Within a few days silver proof CDs are sent from the plant to a QA group where they do a final check to ensure that no anomalies have been inadvertently introduced into the CD or the code. When the silvers are approved, then the replicater starts pressing the CDs that are then shipped to the operations plant for insertion into the final box. Once the completed package comes off of the production line, it is shipped to stores. Usually a game goes gold 3-6 weeks prior to release, so once Mario confirms RL has gone gold, he can give a more difinitive date. Until then, it's almost impossible.