Last Modified and History Improvements
Great products, very helpful, needs a bit of work for real business application but you are so very close.
My suggestion is to add the emailID of the last person to modify a shared doc. You already show the date/time it was last modified. Now if you can show who last modified it (if its shared) that would very helpful so we don't have to actually EDIT the document and view history to see who modified it.
This would be really helpful because I have already checked docs which I modified last but forgot. It is a waste of time. If I know I am not the last modifier then I know to check the doc.
Also, while on the subject, it would be nice to view the history (and diff) from the viewer without having to open the doc in edit mode. Most of the time I just need to go check out the updates and its unnecessary to actually edit the doc. Great job on the diff tool by the way.