Woods Creation has published three tutorials on exporting Carrara models and scenes to Blender, with the help of mCasual’s Blender Python script “mcjBlendBotSpecial”.
Casual, the maker of the Daz Studio to Blender Cycles GPU rendering scripts called McjTeleBlender, has shown early script support for Carrara to Blender Cycles GPU rendering engine. While it may take several months for Casual to do something that is easy to use, it is possible to see preview can be done already now, more details in these threads: