I think it was mostly multi-protocol clients, which are not limited to one network, and products that one-upped IM like Skype or gTalk. Other than that, is ICQ

I think it was mostly multi-protocol clients, which are not limited to one network, and products that one-upped IM like Skype or gTalk. Other than that, is ICQ more dead than MSN messenger or Yahoo's IM or AIM?