Then there's the links page, connecting to other sites. Not necessary on every site, mind you, but appropriate for directing visitors to other useful resources. They'll scroll a little. Then you've got content pages, where you're presenting material you want the user to see, digest, and respond to. In most sites, the user is willing to spend some time with the content.
Longer pages are allowable, then, but only as length serves the content.
Give the user enough to make them want to move to another page with more information. On the other hand, look at the tutorials on WebMonkey. A longer page, but still a digestible length, is appropriate to the content. I do believe in printable pages with all content together, as well. That's my theoretical position, anyhow.