NiRA (Nigeria Internet Registration Association) has just made public a list of 6,957 domain names considered "Premium Domains". They will be sold by auction and any interested parties can make offers now. It also means that any names not on the list are considered "open season" and can be bought by anyone at normal market price.
Here are the Premium names auction criteria: http://portal.netorbmedia.com/knowledgebase.php?action=displayarticle&id=25
and here you will find the list of all the Premium names: http://portal.netorbmedia.com/knowledgebase.php?action=displaycat&catid=5