Scrolling through a long web page on a Windows Mobile smarpthone (Standard Edition) can be a giant pain using the up or down arrows on a navigation pad. However, you can (sometimes) use the 2 and 8 keys to page up and down (respectively) through a web page in Internet Explorer. And, yes, it works on smartphones like the Dash with QWERTY thumb keyboards instead of a conventional numeric keypad.
Note that the 4 and 6 keys do not scroll left/right as they do when using Operamini. And, it doesn’t do anything on a Pocket PC (Professional Edition) – presumably because you can use a stylus to quickly move through a page. And, this keyboard trick doesn’t work on all pages. The infamously mobile device unfriendly CNN.com website inexplicably grabs the keys to use with their little used bottom of page menu section (this doesn’t happen with a desktop PC, btw).