Shani-o-Rama

If you have a laptop, there's a feature in Ubuntu 9.10 (not sure if it existed before but seems basic enough to be present in earlier versions) that lets you scroll a page vertically and  horizontally using two fingers. Mac users are probably already used to this feature.

To enable this, Click on System>Preferences>Mouse. Then choose the Touchpad tab. Here you have setting to enable Two finger scrolling or edge scrolling (default) or disable them both. Next to them is the option to enable horizontal scrolling (hardly ever needed)