Marco-
Erik, I haven't seen a comment from you about this so far, but I would be very interested how you want to solve these problems.
See my response to Brion: http://mail.wikipedia.org/pipermail/wikitech-l/2003-May/004200.html
Specifically note that textual quotes are already a form of fair use, and more closely linked to the actual article text than images. You don't want to forbid us to quote Martin Luther King, do you?
Regards,
Erik