I am with Molly on this one, I love this feature because I am ALWAYS looking up something someone said in a conversation.
With this, all I gotta say is "Let me write that down" wait a few seconds and say "Yup, got it." without having to actually write anything down!
I love Google.
Looks like you'll need to opt-in to save your Gmail chats by default. While the feature is still not live, the default setting is:
"Don't save chat history in my Gmail account - your chats will not be saved or searchable in your Gmail account (as you're chatting with someone, you can go "Off the Record" if you don't want them to save their chat history either.)"
On the other hand, it sounds like you ARE potentially On the Record, by default, if someone has their logging turned on.
At least Google is linking to friendly "more info" links.
Love the show!