Thanks for the questions everyone.
Yes, we could have built a DWF viewer. But, in the end everything is just triangles. Our exporter gets the mesh information from the model elements the same way that DWF does. Our export file type ".gbm" is just a text file, meaning that anyone who wants to help write an exporter for another application, say Digital Project or Rhino, can do so just by reverse engineering the file structure. Neat eh?
In addition to the mesh information we use the material information from Revit to bake a lightmap of the geometry using the SunFlow renderer. So your models get a bit of visual bling.
We're entering the beta phase. Unfortunately, Apple makes it difficult to do a beta of an application without fully releasing it, or adding all the potential beta candidates to your "development team." So the beta will be by invitation only.
Please check in on the blog (
http://www.go-bim.com) for the latest information.