My group has been using Dropbox and Google Drive for some time to manage our sessions, including archiving all of the GM's assets. It'd be awesome if I could tell the library to "watch this folder" in Dropbox or Google Drive so I could bring in my tokens/maps/sounds/whatever. If that's too complicated, I'd still like to see an ability to hotlink to my assets or search for tokens by specific website.
NOTE: The latter functionality is already supported, kind of... sometimes... as long as you know where your assets are, and they are publicly available. Do a site-specific search, for example "site:community.wizards.com map" to get maps from Wizards' community forums. It's a bit kludgey, but it works. (It works best if you have your own website and can set up directories for files.)