Avenir in action on howwegettonext.com

Under the hood

.header-1 { font-family: 'Avenir LT W01 85 Heavy'; font-size: 16px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 16px; text-transform: none; color: #363636; background-color: #FAAF2C; }
.header-2 { font-family: 'Avenir LT W01 85 Heavy'; font-size: 70px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 80px; text-transform: none; color: #FFFFFF; }
.header-3 { font-family: 'Avenir LT W01 85 Heavy'; font-size: 18px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 64px; text-transform: none; color: #363636; background-color: #FAAF2C; }

Avenir is available from Fonts.com and MyFonts.