Among my social group, everyone now uses Facebook Chat, iMessages, or Google Talk. I think I only have one or two people still on AIM. I think the problem with AIM is the lack of a default mobile client. Everyone's phone has Facebook installed, or comes with either iMessages or Google Talk. Nobody bothers to install an AIM client (I'm not even sure if there's an official one, and if it supports Push notifications)
Facebook Chat has a Jabber interface.
Among my social group, everyone now uses Facebook Chat, iMessages, or Google Talk. I think I only have one or two people still on AIM. I think the problem with AIM is the lack of a default mobile client. Everyone's phone has Facebook installed, or comes with either iMessages or Google Talk. Nobody bothers to install an AIM client (I'm not even sure if there's an official one, and if it supports Push notifications)