title: Jquery file upload preview thumbs
body: <p>In the example at <a href="http://blueimp.github.com/jQuery-File-Upload/" rel="nofollow">http://blueimp.github.com/jQuery-File-Upload/</a> the file uploader creates previews of the images you are going to upload as thumbnails.</p>
  
  <p>I know how to get thumbnails to show after upload because the <code>done:</code> callback returns some data about the file you uploaded, but how is it done before upload without actually uploading the file first (I didn't think this was possible without uploading first)?</p>