Increase/Decrease Font for Visually Impaired

[IcheeWaWa]

Does anyone know of a mod that will add an option increase/decrease the font sizes for users that are visually impaired?

Such as:

http://www.dyn-web.com/code/fontsizer

[Internetcafe]

Hold your Ctrl key down while you use your mouse wheel to increase-decrease font size.

[Marco van Herwaarden]

If your font size is good for regular users, it should also be good for those with poor vision considering that they probably already have set their browser to a large font size.