Does anyone have ideas on how to implement an upload 'queue'? Specifically, my site allows users to upload mp3s, but I'd like to defer the uploading of submitted files when a form is submitted so that the user can continue browsing the site while their file uploads in the background.
Ideally I'd like to be able to check whether or not a file has completed upload (I'm not too worried about upload progress) so I can display a throbber/spinner in the user profile page. Any ideas on how I can do this within the existing framework?

