A Japanese gaming website, AV Watch has dugg up information that indicates that 3D gaming could be activated on Sony PS3 through a firmware update on July 10th. While information regarding this is patchy at the moment, we assume this is to happen concurrently with the introduction of 3D blu-ray movie viewing.
However, do note that users who wish to access 3D based games will need a compatible set along with the 3D viewing glasses. Sony is notorious for its pricey accessories and so do not expect these to come cheap.[AV Watch via Sixth Axis]