Can't wait to see 0.14 ready to test.  Actually, can't wait to see the final in the Store!

Trying to see how you'd change the order.  I'd hate to see a "sort order" attribute on each node.

How about the north-to-south or west-to-east position of each node in the shader?  This seems like a natural expectation:  if you put sliders or textures in a given arrangement in the editor, the Inspector fields should be similar.  Just a suggestion.

This is about the smaller Mac keyboards (chicklet and laptop types).  Luckily I held onto the older full keyboards that have both keys separate.

"If you select files and hit backspace, would that be the same as selecting and pressing delete?"

For files in the Finder, no.  For many other applications, backspace and delete both kill whatever is selected; they differ only when there is nothing selected (such as between letters of text).  In my experience, this is generally true for Windows and Mac OS X, though individual examples differ all over the place on this.

Oh, I am using Unity Free 4.2.1f4.

The animated vertex shader does animate in the editor.  (The sphere textures roll west-to-east, the swelling rolls east-to-west.)  When I leave the editor, the knot is swollen in different places, but does not start animating in Scene nor Game views, in either playing or editing modes.

Hm, after posting this, the refraction started working.  Almost.  I don't know why it was not working, then it started working.  The console shows nothing useful, except a warning "HDR RenderTexture format is not supported on this platform."  Not clear if that's related to the refraction or something else.

http://i.imgur.com/kBSCphu.png

As for the refraction, it looks like the vector calculated through the quad is not correct; the image is flipped.  Eye vector is downward toward quad, so refracting vector should be somewhere between same downward direction and anti-normal.  (Same vector is IOR 1.0, anti-normal is IOR infinity, tangent is IOR 0 I think.)  An IOR slider would be an interesting way to control it.