Well, I have been using Outlook 2010 since June and it has threaded discussion features since then. I am sure as he was an Microsoft employee he had access to t

Well, I have been using Outlook 2010 since June and it has threaded discussion features since then. I am sure as he was an Microsoft employee he had access to the early release and dog-food versions which he should have tried. So, threaded discussion shouldn't be a new feature for him. And if he was using Outlook I don't know why offline Gmail wows him so much.