What happened to eReader format support?? It's the only reason I'd consider buying yet another eInk machine.
I also thought they had intended a file system that allowed folder access, instead of the 10-at-a-time menu selection...after the brighter screen, I think my favorite improvement when going from the PRS500 to PRS505 was the update made to the book selection pages (filtering further into groups by alphabet). It just takes too long to page through 10-at-a-time when you have 600 ebooks on a memory card!
EDITED: Obviously DaleDe was reading my mind while I was typing this reply and answered at least part of it before I could even hit send!