what i meant is a dedicated key that when pressed will trigger a page-up/page-down event. on the mac you have to press a modifier key to make it go. most of the time this is ok (and i don't really mind it whilst in emacs ctrl-v/meta-v are basically the same thing) except that you can press ctrl-pageup/down on firefox to toggle the tabs. on the mac you have to press ctrl-mod-pageup/down ... same goes for gnome-terminal. i don't feel like turning my fingers into a pretzel for no good reason.
http://www.notebookreview.com/assets/15839.jpg