Avenir, Helvetica with Monotype Century School in action on blog.mijlo.com

Under the hood

.content-1 { font-family: 'Century Schoolbook', serif; font-size: 75px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 67px; text-transform: none; color: #FF6400; }
.content-2 { font-family: 'Avenir Heavy'; font-size: 11px; font-style: normal; font-weight: normal; letter-spacing: 1px; line-height: 11px; text-transform: uppercase; color: #333333; background-color: #FF6400; }
.content-3 { font-family: Helvetica, Arial, sans-serif; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 23px; text-transform: none; color: #9B928D; }

Avenir is available from Fonts.com and MyFonts.