You could consider one page if you are using any type of ajax technology that allows a show-hide type of functionality - gives the user more reason to stay and keep exploring without overwhelming them with text. And allows you and/or users to target specific places on the page for bookmarking or reference.

OTOH, do you have any sort of sponsors on your site where you are selling pageviews? That would be another reason to split into pages.

I know for myself I am more likely to explore within a page than click thru to a lot of pages. Blogs have gotten me in the habit of scrolling and using command/control-F to find what I want on a long page. You could even post that at the top as a user tip.