Google Font API
At work we discovered that a few websites had some pretty awesome looking fonts that weren't image based and also weren't installed on our own computers. Up until recently, web pages would only show fonts that are installed on your computer, so web developers always use common and easy to read ones that are installed on almost every computer like Arial, Georgia, etc. If you were seeing a cursive or stylized font, you were usually seeing an image or Flash.
One of the developers at my work noticed that the site was linking to a Google stylesheet, and lo and behold we discovered the Google Font Directory and Google Font API. It looks pretty cool; we'll need to be trying it out soon.
Google Font Directory
Google's font directory is fun to explore. It lets you browse a bunch of the fonts and read a bit about the font designer. It seems super easy too. I'd do an example of it now but I'm not on a computer where I have FTP and a text editor installed, so it's too much work to upload the header file. However, assuming that wasn't the case, all you have to do is choose the font you like and Google will provide two bits of code. One line needs to go in the header section of your HTML file and the other part just needs to be applied just like any other CSS class. Why didn't this exist a long time ago?