[With downloadable kits containing EOT, SVG, WOFF, and TTF versions, Cufon versions and a stylesheet with the @font-face rules for easy @import-ing][link]. This is drop-in simple. What more can you ask for?
Maybe a slightly better browsing interface, but other than that?
[link]: http://www.fontsquirrel.com/fontface “Font Squirrel | Download Hundreds of Free @font-face Fonts”