Well... almost ;-) I've been using the Google Talk in iChat or Adium (and then back to iChat) for some time now. Back in August I read this Lifehacker article and implemented it. I'm a total clepto when it comes to chat logs... I keep everything I can usually. When your done you have the ability to route all of your various IM accounts (AIM, Yahoo, MSN, Jabber) through one Google Talk account. I have my AIM and Yahoo buddies actually on again now. And whats really cool to me is all the logging takes place in gMail, so when I think: "what did SoAndSo say about the bananas again?" I just search for SoAndSo and bananas in gMail and I never have to think about whether it was an email conversation or a chat one. It makes me happy =-) Also there are lots of other cool Jabber services out there that this can be used with, so that is cool. I tried doing IRC over jabber for a while, which worked, but doesn't have enough features for me once it goes through the limitations of the gTalk service (notice these are gTalk limits, not Jabber limits).
There are two major caveats to this approach. The first is that you can't do direct connect, file transfer, voice or video with folk on other networks this way. The other is Skype doesn't have any transports (to anything, the bastards). Given that iChat does pretty good audio, video and now desktop sharing and that most of my Skype people are also on either gTalk or AIM, you may be seeing me less and less on Skype.
