Below is a list of web safe fonts that are usually installed on every computer. Typography on the web is a bit restrictive because designers must select from this list to ensure consistency across platforms and browsers.
It is possible to substitute an image of text rendered in any font, but for accessibility and search engine optimization, it is good practice to keep as much text as actual text, not imagery.
That said, there are alternative techniques like swfIR and many others that fix accessibility and SEO hitches, but these are usually meant only for headlines or short text phrases.
This screen shot was taken in Firefox 2.0.0.4 for the Mac.
