Some stuff from one of the "Snakes on a Blog" sites that cracked me up:
I don't think that Snakes on a Plane has a tagline yet. ("Harry Potter 4: The Time Has Come", "Raiders of the Lost Ark: The return of the great adventure") What should "Snakes on a Plane"'s tagline be? Obviously "Snakes on a Plane: there are motherfucking snakes on the motherfucking plane" is everyone's first choice, but they can't print that on movie posters.
I'm partial to Sam Jackson's own "Snakes on a Plane: either you want to see this movie or you don't". Simple, direct message. "This movie is going to be so good that we'll already be selling out theaters and turning people away".
Other ideas:
"Snakes on a Plane: The final battle between ancient reptiles and modern aviation."
"Snakes on a Plane: Some luggage is better lost."
"Snakes on a Plane: Your in-flight entertainment is DANGER."
"Snakes on a Plane: What you see is what you get."
"Snakes on a Plane: Did we mention Samuel Jackson? Oh yes we did."
I think we need a SoaP thread....