For people like yourself learning what preservation work has been accomplished from these forums there is a thread which lists most of the projects.
That information is also available in a wiki, which if you do your own preservation you can put up information on it here:
http://originaltrilogy.com/fan-edits/fan-project-list.cfm
As for the Bonus features, there's two sets which come to mind, Rowman and Editdroid.
http://originaltrilogy.com/forum/topic.cfm/The-Official-RowMan-Release-Thread/topic/2947/