There are times when we want to use a specific font in a webpage but we're not sure if the computers where it will be displayed, will do it correctly. When we have these kind of problems what we usually do is to create an image to replace the text. Doing this is not suitable, since our page wont be SEO friendly and take forever to load. In order to display the font we like and still be able to see out text as actual text an alternative called sIFR. These alternative uses Flash in order to convert our text in images, the difference is that we don't have to create the images, just write down the text, and if we turn off images in our webpage the correct text will also be displayed.
An alternative to sIFR is also available, since much people don't like Flash that much. It's called
facelift.

According to their webpage, FLIR (Facelift Image Replacement) is an image replacement script that dynamically generates image representations of text in specific fonts that usually wouldn't be visible to visitors. The generated image will be later inserted through JavaScript and visible in almost every browser. If you disable images, you can still get to read the text, this means that crawlers will also see the information, making this a very good SEO practice.
You can check some examples and extra information in their webpage. If you've used any of this scripts let me know what you think and how well they've worked for you :)
Source: WebResourcesDepot
November 15th
Thanks for the info Susana.