I tried building a model in Sketchup, importing it into Photoshop, and then saving it as a 3D .PSD file. I then imported that into After Effects with the "Live Photoshop 3D" option enabled. It worked okay, but the quality was very poor, and it behaved like a 2D layer (couldn't move around it, etc.). After Effects also crashed once while I was working.
I tried the same thing with the Blender file. The quality was much better, but I still couldn't figure out how to move around the model.
I've also tried saving my Blender file as a .RPF file (I think it was a .rpf- I'm not in front of my computer), and import it directly into After Effects. That didn't really work, either. With all these methods, I can get the model to show up-- just not in 3D.
Ryan