From viewing the system here we can confirm that your paper is at status “Required Reviews Completed” as of 30 November 2012.
This means that the number of reviews needed by the editor for your manuscript is now complete and that the editor is already going over the reviewer recommendations that have been submitted. The editor may at anytime make a decision or may decide to wait for the other reviews/invite another reviewer if not yet satisfied with the results of the review.
Please be assured that the editor will contact you directly once he arrives at a decision.