Thanks for the help, Mark.

So if I add a UV map I will have less problems with this?  Interesting... If I don't go into the UV editor what does Cararra use to map the shader?

Also I discovered something strange while going through this excercise.  When I change the shape of the cube by shortening one side the bump all but goes away.  But if I make that side larger than the original cube the bump gets deeper.  I believe this is why I wasn't getting any results with my original straight forward mixer shader.  I already had the cube shortened to a wall shape.  Now, this doesn't seem quite right to me.  What do you think, is this the way it's supposed to work?