uploading to file storage is very different from uploading content from forums or similar... i agree that it would be useful, and probably not too hard to set up. You would need to unzip it into temp space and then list the files and import each individually into the zipped folder heirarchy... you could take a look at how apm deals with files on the file system - it would have much of the file lookup code in place. And then an import is just saying, when you see a folder, make one in file storage... etc.
