Homebrew PCBs

Has anyone thought of a Yag laser for PCBs?
I see people are actually 'milling' the unwanted copper off the 
boards.


Yags are great for copper (On CO2 lasers, copper is a BIG no-no) and 
the beam can be delivered via fiber optics with a Yag.  Plus you 
cna 'drill' the holes without a tool change.  Get fancy and you can 
adjust to focus for bigger/smaller kerfs (though not recomemned)

Nice chemical free way of doing it (at least chem free before PTHs)