Rhino and IFC ? Some strange combination

As explained on http://geometrygym.blogspot.com/2010/06/ssirhinoifc-progress-industry.html, the "Geometry Gym" created a plugin for Rhinoceros3D to import and partly export IFC models.

As hinted in the blog-post, putting Grasshopper in the mix as a generative system for BIM makes it really interesting.

But at the same time, I wonder how to manage a structured building model, in a generic modeling software.

Currently available as a trial license, which suggests that the software will not be free.