I've now patched the image upload code over at hugoesk.de to generate the necessary data for Enclosures. This way, Newsreaders that support Enclosures not only get the preview image but also the original image (usually 1800x1200 pixels - suitable for enlargements up to 10x15cm). For Newsreaders that don't support Enclosures, everything remains the same. Let's see what iTunes will do with this - it should also be able to handle artwork. Although this is probably intended for covers of MP3 Enclosures - possibly the images won't automatically end up in iPhoto (where they belong) but in iTunes as covers for non-existent albums ...