Homebrew PCBs

Any one looking at printing on copper boards (or any material for that 
matter) using non-standard fluids might want to check out the print 
heads and inks being offered at this site: http://www.dimatix.com/. 
They offer piezoelectric print heads capable of 450 dpi to 900 dpi, 
printing fluids ranging from UV cured inks to hot wax. The printer is a 
bit expensive at $35K, but the print heads seem to be mostly self 
contained and are refillable, they range from $59 to $99 and may be 
adaptable to a cnc machine.

Dave