I needed this functionality, too. Here’s how to do it.
By default, the MIME types in IIS 6 are configured to deliver EOT (as used by IE) and TTF files. But WOFF (Firefox) and SVG (iPhone, iPad & others) will not be served.
Simply add the following MIME type declarations via IIS Manager (HTTP Headers tab of website properties):
.woff application/x-woff .svg image/svg+xml