Fonts

Web-safe fonts are fonts that are found on a wide range of computer systems, and used by Web content authors to increase the likelihood that content will be displayed in their chosen font. If a visitor to a Web site does not have the specified font, their browser will attempt to select a similar alternative, based on the author-specified fallback fonts and generic families or it will use font substitution defined in the visitor's operating system.

A web font is a typeface installed with a web browser, and typically (although not always) designed for screen-use. The term is also used to describe typefaces that can be used by designers when authoring webpages.

The implications of font on my website is that i will have to include the download for the fonts i have used if they are not web safe.

Websites that web fonts can be found on are: 
http://www.dafont.com/
http://www.google.com/fonts/