Looks like someone has actually pulled off the laptop LCD to VGA Holy Grail hack.
They did it! from hardmac.
PCB and software hack took from December 2004 to now.
Google auto-translation of the French forum entry on MacBidouille -
Unfortunately only the first 14 entries are translated. If you want to read the rest you'll have to cut and paste the text into google's language tool. Yes, I've tried using the URL for entry #15 - doesn't work.