sharing same "uploads" folder

Would it be possible using this plugin to allow all the sites to share not only the same uploads folder (which I know can be done on IIS 7.5 by simply creating an ‘uploads’ folder and mapping to each install) however, would like to allow ALL the sites to share the same contents of the upoads…

ex: sitea.com uploads start.jpg and siteb.com user now has start.jpg available to them,,,,

If not, would there be a possiblity or a “wishlist” for such a beast…