There are currently 37 abducted children listed at the National Center for Missing & Exploited Children under the Case Type: Hague Case.
Sean Goldman is not one of them nor is he listed as a missing child presumably because even though he was abducted in a custodial dispute, authorities know where he is. His father, David, told his story of his fight to find him last night on Dateline.
On the website BringSeanHome.org there is a letter describing his efforts.
I have been fighting in the Brazilian courts under The Hague Treaty for 4+ years. All counts of the law under The Hague Treaty as well as Brazilian, US and international law are clear and documented in court records in Brazil and the US that Sean was and still is being retained illegally and should be returned to the US.