Only a few things left...
There are so many cool features and the use of the system is so easy, I have to say, I've already begun moving most of my documents online but there are a few things that need to be addressed.
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*  User defined page sizes
*  Better Image support. Positioning and rendering for printing. Transparent images go black right now.
*  Document back up. The ability to select all of my documents, zip them and download to my HD or to a URL.