In days gone by, providing custom fonts on a Drupal website was somewhat problematic.  Now, in Drupal 7, things are much easier due to the rather intimidatingly named @font-your-face module.  This is very easy to set up and apply to CSS elements on your site, and integrates with a good number of external font libraries like the one provided by Google, or upload your own fonts.

You can see it in action at the top of this page: the "Threepwood's log" title uses a non-standard font that was uploaded through the Drupal configuration screens - no code or theme modifications required!

• Drupal Planet