120413 IFC Grasshopper to Revit - YouTube: "Demonstration and Explanation of progress to import IFC files into Revit from Parametric models in Grasshopper. Uses new Revit Addon from Geometry Gym. Files available from http://geometrygym.blogspot.com
Note, Revit 2012 64 bit Addon to import IFC files.
This is an early public release for initial feedback and comment. Addon undergoing rapid development. Please use with care and send suggestions and observations.