In order to play online you'll need to connect with IWNet, Infinity's own match hosting system. You'll be "completely reliant" on it but what of mod map support? Don't have answers.
"The silence you hear is because we’ve got a community right now structured in such a way that it relied on having dedicated servers," said a moderator, in response to the eerie silence left by Infinity Ward's Robert Bowling and his 'no dedicated' news.
IWNet is designed to keep players of the same rank and skill set together.
"You’re completely reliant on IWNet and there is no dedicated server or server list. You rely on IWNet for matchmaking and your games, but you still have your private matches," said Bowling.
Things look bleak for the modding community though. "I don’t have those answers yet," was Bowling's response, asked if IWNet would offer support to mods like maps and such.
And everything was going so well... Are you ready to pick up that pitchfork and torch, and march yourself over to Infinity Ward offices? PC gamers are naturally irate over these changes.