Per discussion on: http://ffxiv.gamerescape.com/2012/06/07/e3-2012-interview-summons-chocobos-train-tracks-and-rocks/

In the next short while Yoshida said that they would be releasing a comprehensive list of content that can be missed and impossible to perform post 2.0 launch.

Do we have any updates on this?

Also, please include anything that can be found in ones' History as missables we are interested in knowing.

Thanks!