I've created an asset post processor for Unity, which optimises models created with Asset Forge. The number of draw calls is greatly reduced, and the model is modified so that it will work with dynamic and static batching. Using some very simple examples, I reduced a 28 draw call model to 4 draw calls.
Optimised model import in Unity
I've just fixed the UV combining but still need to work out how to combine the normals and preserve the soft/hard edges.
I've also got an idea for another importer, which will do the same things, but also convert materials into vertex colour values, so that a shader can then use those values in a single material. This would reduce any model from AssetForge to a single draw call, at the expense of some extra configuration inside Unity.