thanks ddharriman for this very thoughtful review. it's really useful to hear some details of the upgrade for people who are unsure whether to do it or not.
as for epub, the last news i had from bookeen was that they definitely plan to implement it, because they want to support as many formats as possible. so hopefully soon (i too am very very eager for epub support on as many devices as possible !!). and who knows ; once they have epub, perhaps they will also implement reflowable pdfs. we can hope ! but epub first, please, bookeen !