I'm afraid they'll leave out the most interesting parts of the book and make it a dumb action movie. For me, what makes the book great isn't the plot, it's the satire of american suburbia, globalization, and the weird tangents into sumerian mythology and NLP. I hate when they make movies out of my favorite books...
If you like weird tangents and biting satire of American suburban culture, try _Infinite Jest_. Both Stephenson and David Foster Wallace owe a debt to Thomas Pynchon, but Stephenson's relationship to Pynchon is unfortunately a lot like Dan Brown's (_The Da Vinci Code_) relationship to Umberto Eco (_Foucault's Pendulum_, another great hacker book): it's simultaneously superficial and exploitative, a kind of literary m…
[EDIT: Maybe it didn't help that it was a Kindle book. I've read long books on Kindle, and it's gone fine when the books are mostly enjoyable and easy to follow throughout, but when they're not, it probably helps to have more physical clues as to where you are in the novel. IJ's chapter titles certainly didn't help me to know my way around the book either.]