We are seeing a number of emergent projects focused on getting Grasshopper models into Revit.
Current Projects
VisualARQ - VisualARQ adds architectural features and parametric architectural objects that are suitable for both 3D modeling and 2D documentation.
Geometry Gym - Generative BIM model exchange is provided using a combination of OpenBIM formats (primarily IFC) and direct API interaction to popular software.
RhinoBIM - RhinoBIM is a suite of a number of plug-ins to enhance Rhino 5.0 for the Architectural, Engineering and Construction Industries