I'd love to see you it too, but it's pretty much guaranteed failure - both critical and commercial. It would take a genius to make Snow Crash look good and make sense on film...
I'd prefer to keep the visualization of Snow Crash in my mind and not have it screwed up by some cheap and tacky production that will never match expectations.
Some books should just remain books, and both Snow Crash and Neuromancer are in that bucket. If Gibson wants to be a screenwriter, then he should write a story for the screen.