The Jerry Cornelius series constitutes some of the most awesome, unfilmably trippy/trippily unfilmable science fiction I've ever read.
Though what the hell, there's a Naked Lunch movie.
Also---kind of depressing to think that what stopped Grant Morrison from making an Invisibles movie/TV series was, according to him, the first Matrix movie being almost exactly his ideas for it. I liked the first Matrix movie and all but there were single pages from The Invisibles that were better.