The is no way of currently incorporaring a SW Native file, you may get results wit eDrawings, 3DVIA player or 3D PDF.
If you want something really simple, you should also look at U3D and 3DXML. These are used on the 3DContent Central download site. You can also create VRML and STL if you want to import the files into Blender and then translate them to Collada (dae).
Take a look at http://www.3dvia.com for some examples and ideas.