Conversation View
We recently converted to Google Apps and it took a little while to get use to it but I enjoy the "conversation view". Now instead of having to determine who replied, when, and in what order it is basically shown as a thread. It comes in very handy when you are out of the office for awhile. Now when I return I have the entire conversation for a topic that someone might have sent to multiple people. It saves me from replying to messages that others have handled while I was out so I no longer get, "Joe handled while you were out, see his reply on ......" or "Mary already replied for the group, see her reply from ......" Conversation view is the way to go.
