I've only been doing it for a few years. Video chats still happen and phone-in meetings but a lot of things are captured somewhere: email, wikis, commit logs, trackers and the like.
Agreed, probably the biggest for us is IM logs actually.
Usefully searching and organising email is an open problem - there is probably considerable scope here for improvement and I'm sure enterprises would pay lots for some kind of meaningful email discussion trend mapping.
