Homebrew PCBs

High everyone,
I've just joined your group even though I've been cruising this site 
for a while. I'm a member over at cnczone (great site) and I started 
a thread there on alternate pcb manufacturing ideas. One of those 
ideas was direct printing of pcbs (i.e. a mask) via a flat bed 
(gantry) style, solvent based ink jet printer head. Later I was 
kindly informed by Ballendo (a member here and at cnczone) that this 
and many other ideas had already been discussed here and that I 
should visit this site. Since that day I have followed some links 
posted here and noticed that direct printing in this manner is 
already being tested and shouldn't be too far away before it's a 
commercial reality. No doubt the commercial product will cost a 
fortune but I was thinking more of a homemade style machine for doing 
1 - 25 pcbs at a time. Let's face it, it's only a mono-colour print 
head capable of holding either (a) a solvent based ink OR (b) a small 
heated reservoir holding laser toner type material (i.e. plastic 
based) which technically shouldn't be that difficult.
Idea number 2 that I had was to laminate photo etch material to pcb 
and put it under a very low powered, gantry style cnc mounted laser 
and used this to expose the photo etch. Then yesterday I was watching 
a presentation (Photoshop class) with a digital overhead projector 
when it occurred to me the possibility of using that. Most of you 
know or have read about homemade LCD projectors so, what if you 
change the lens for something that is suitable for close up work? 
Remember that an LCD OHP has to use all colours and here all we want 
is black and white (i.e. light/no light) and if an LCD OHP can be 
viewed with an image at 3m x 2m then surely a resonable resolution 
could be had at 150mm x 100mm (6" x 4")? It's probably been tried 
before and doesn't work but I just thought I'd ask anyway.
Skippy