Good news from the offical Dynamic Connector blog with the statement it already supports NAV 2013
The full article can be found here
The Connector for Microsoft Dynamics team is pleased to announce that the current version of Connector for Microsoft Dynamics (V2 RU1) fully supports the recently released Microsoft Dynamics NAV 2013 product.
If you have Connector for Microsoft Dynamics version 126.96.36.199 or 2.1.371.1 then you are ready to integrate data to and from Microsoft Dynamics NAV 2013 on-premises. If you do not have one of these versions of Connector for Microsoft Dynamics the most current one, 2.1.371.1, can be downloaded from PartnerSource using the link provided in the “Related Links” section of this blog or by using this direct link to the PartnerSource download page:https://mbs.microsoft.com/partnersource/deployment/resources/productreleases/MDNAV2009R2_CRMConnector.htm