Async AJAX Uploader with progress bar for Zope

I've tidied up the Threaded Transfer Agent code somewhat, and added enough support into it to build an upload demo that shows asynchronous uploads in action. The screenshot shows multiple uploads in progress, from the one form, allowing content to continue being added. The status is updated from Zope via XMLRPC (using jsolait), so I guess it's technically an AJAX application.
Async Upload Demo in Action

I'll release this code soon, I've got to find some people to alpha test it, I'm sure I'll have a few volunteers.

Actually if you know a bit about JavaScript for IE, I'd be happy for you to contact me as some of the status updating code doesn't work so well for IE (runs like a charm in FireFox), so I can get an IE version of it working. The JS code itself does fairly simple things, but, doesn't work satisfactorily in IE.

No, it's not an April Fool's joke.