Google Talk

OK, so google has launched their new IM client -- woo hoo! I fired up Adium, set up a new account, put in my google information, and... nothing.

I mean it works and all, but all my friends are already on Yahoo!IM or AOL. Why do I care about google talk? One thing that's interesting is that google talk seems to be focused on VoIP, which Yahoo!IM certainly offers as well. Sadly, the internal microphone on my iBook seems not to work -- bleg: everything seems to be set up correctly, can anyone help me get my internal mic working?

Update Long-time winterspeak reader WC notes that the phone feature is only available on PCs. In addition, I think the google ads only run on PCs as well.