The end of the day is when I do the ebook thing and last time I looked, I have about 66mb of them on my 700p. I mainly read the classic and older books. One plus is that HanDBase does run on the WM platform, so that leaves a mailer with the capabilities of ChatterEmail as an important factor - of course one handed operation or something like that is important.
Wednesday should be a day with a bit of time for a look-see.
Ben