Add Google Drive / Dropbox API to make collaboration much easier in terms of development
As I currently understand it, Google Drive and Dropbox both offer an API which could make the collaborative feature within your service much easier as these services handle most data exchange when a file is stored on their end. I could be wrong, but it might be worth looking into
Adminwikibudgets (Founder, wikiBudgets) commented
That is certainly true and again it is a part of much bigger feature block.