We have sucessfully installed the Cybook Gen3 firmware on the Netronix EB-100:
Flickr.
This is probably doable on the
STAReBOOK too (and other clones, such as Ganaxa), so we need brave people who are willing to try.
All the information we've found so far is here:
http://openinkpot.org/wiki/CybookGen3; if you need any help - just join our IRC channel: #openinkpot on irc.oftc.net network and ask the question.