Media upload finished hook

it’s a longshot but,

add_attachment hook, actually fires after the first file finished uploading:

 add_action('add_attachment','redirect_uploader_flow');

i’m using it to load a custom interface for resizing a Image loading in the current TB window:

    jQuery("#TB_iframeContent",window.parent.document).attr('src',"<?php echo get_window_url($id) ?>");

the main problem is that it will break multiple file uploads