Here is a cool one for you, the Google Font API. It is still in Google Labs, officially, but it is pretty good already.
Basically, the Google Font API helps you as a web designer, allowing you to use some special fonts on your websites, without relying on the user having it installed, or some of the other techniques, like sIFR.
Check it out and try it on your next project. Unfortunately, the font choice is very limited, but should work fine for many purposes.