At the very least you're now depressed. Far Cry 2 also missed out on dedicated server supports, with third-parties eventually running unofficial multiplayer matches.
"The online experience does not support dedicated servers," Ubisoft, presumably whilst twirling their evil moustache. It's sad news for the PC gamer brigade.
Far Cry 3 releases on Xbox 360, PS3 and PC November 29th in EU, December 4th in US.