Hi,
from a web article
An associative import of CAD data from CATIA, SolidWorks, NX,
Pro-E/Creo, and Alias files allows you to maintain a link to the
selected file. The imported geometry in Inventor updates as the model
changes.
Sounds very useful, but it doesnt mention Rhino, but it does further on…
Selective import support allows you to only read in the geometry
that is important to you, speeding the import process: The new Select
tab provides you the option to specify which objects to import when
importing a CATIA, SolidWorks, Pro-E/Creo, NX, Alias, STEP, IGES, or
Rhino file.
Multi-thread support has been enabled. This allows Inventor to more
efficiently use the available hardware on which Inventor is running. As a
result, you will experience improved performance when working on files
from other CAD systems.The options for importing CATIA , SolidWorks, Pro-E/Creo, NX, Alias,
STEP, IGES, Rhino, SAT, Parasolid Binary files are simplified and
provide clear choices for import.
so anyone able to say how Rhino imports into Inventor, and back out again ?
Rhino is for me lots of layers, different colours for my different ‘curves’, raster mages on some layers, etc, Inventor is somewhat different it seems, so what happens to all those layers and what they hold ? upon entry into Inventor then upon export from ?
Hopefully not the final scene from ‘The Fly’ 
Steve