@font-face support in Internet Explorer
From Webfonts.info
Webfont support in Internet Explorer 4 and higher
font-family
@font-face {
font-family: GraublauWeb;
}
@font-face {
font-family: "Graublau Web";
}
src
You may specify the link to the font with relative or absolute URLs.
Internet Explorer only supports TrueType fonts convertet to EOT (Embedded OpenType).
@font-face {
font-family: GraublauWeb;
src: url("GraublauWeb.eot");
}
@font-face {
font-family: GraublauWeb;
src: url("http://www.webfonts.info/fonts/GraublauWeb.eot");
}
IE won't accept a font that includes a format string in the src descriptor. For example src: url("GraublauWeb.eot") format("embedded-opentype"); does not work.

