Homebrew PCBs

Hi All,

What is the term for the process where your traces are simply  
"outlined" by etching, and as a result, most of the copper is left on  
the board, and you presumably use a lot less etchant (and maybe get  
some 2D RF shielding as well).

What I'm talking about is used by SparkFun a lot, as in: http://www.sparkfun.com/commerce/images/products/00718-02-L.jpg

I suppose I have two questions really:

1 - what do you call this?
2 - is there a handy one-click way to do it in major CAD packages?

PG