According to Paul Irish’s article on Bulletproof @font-face syntax, this is the best @font-face syntax to use:
@font-face { font-family: 'Graublau Web'; src: url('GraublauWeb.eot'); src: local('Graublau Web Regular'), local('Graublau Web'), url('GraublauWeb.otf') format('opentype'); }
Check out his article for more information on why this works and the road he took to get here.

