One of the best features of the movies and TV Shows area of Plex (and Boxee for that matter) is the mark as watched feature. I wish this feature would also apply to internet shows such as Revision 3 videos so that I know what I already watched and it would be removed from the list. I see the feature is there is other areas and also know that other apps can and do have this feature on internet channels/media. FYI, this feature is included with the queue.
So I would like to see that if possible.