Brian,

Once installed you will find the shader under the Sparrowhawke3D submenu.

Use it with the alpha channel on something like a classic wine glass spline object rather than transparency and see what happens.  Adjusting the Acuteness Falloff will exaggerate the effect.

Make a cloud shape or something like that in the vertex modeler and hit it with a wave deformer.  For clouds and smoke stuff use it in the alpha channel and check the EdgeFalloff Inverse option so the edges fade away.