Microsoft has just updated the following download for ConfigMgr 2012:
System Center 2012 SP1 Configuration Manager Package Conversion Manager 2.0 Beta
Package Conversion Manager (PCM) Beta is a feature pack download that lets you to convert ConfigMgr 2007 packages into System Center 2012 SP1 Configuration Manager applications. http://www.microsoft.com/en-us/download/details.aspx?id=34605 I’ve updated the list of Microsoft Downloads accordingly.