Multiple files upload (Dropbox plugin function or stand-alone plugin)

Hi.

Recently, we’ve been using the Dropbox plugin quite extensively, in order to add big bunches of new Items to our repository, and we’ve repeatedly found ourselves in a situation where contributors would have to upload many files to the Files directory of that plugin (for small numbers of files, the Contribution plugin could work just fine, I suppose).

Is there an alternative to providing contributors with FTP access to that directory? I was wondering whether anybody has ever considered / implemented some sort of multiple file upload function (ajax? jquery? zend?) to the Dropbox plugin itself, or maybe via another specific plugin.

Thanks in advance for any hint you might provide.