I wanted to add this quick reference to the proper way to setup mime-types for @font-face here. Thanks go to Mike Kormendy for his blog post about these, and his answer on Stack Overflow to a similar question that led me to his blog post.
svg as "image/svg+xml" ttf as "application/x-font-ttf" or "application/x-font-truetype" otf as "application/x-font-opentype" woff as "application/x-font-woff" eot as "application/vnd.ms-fontobject"
You can set these up in IIS manually, or you can add them to your .htaccess file or web.Config file (depending on platform.) Note: These are not standard yet, but there is a proposal to make a standard mime-type for font files.