Using Typekit fonts in your own CSS
Sean McBride for Typekit:
The options range from basic and drop-dead simple (just add fonts and selectors, then drop in the JavaScript) to the more complex (taking advantage of variation-specific font-family names to work around style-linking limitations in old versions of Internet Explorer), and everything in between.
Sean explains four ways of using Typekit fonts, with example reasons why each might be the right solution.