eb fonts are pretty hot topic as of late. With the up rise of CSS3, people are trying to do more with pure HTML & CSS rather than relying on images to accomplish similar task. Logos, banners and things of the sort tend to be the most popular use cases, but it isn't uncommon to see custom fonts used throughout an entire site.

Although it is a more recent craze, support for web fonts has been around for a long time. You could render custom fonts in browsers as early as Netscape 4 Internet Explorer 4. As is usually the case with many things in the css realm, the problem with fonts has always been differences in browser implementation.