Page numbers are next to useless for me, but I can see how others would miss them. I find the progress bar to be good enough, considering that it saves the spot where I am reading.
I haven't had any issue with bookmarks. They seem to work flawlessly. I have heard some people saying that if you loose your charge completely they don't work though.
To get a quasi-sort by author, put books from each author in a named folder and sort by File Path.
I've found the battery life meter to be pretty off as well. It seems to go from 100% to 90% with nothing in between. Also, though I haven't had mine loose its charge completely, I understand that after it hits 40% it is drained completely shortly thereafter.
All in all, I am happy with the way it works now, though I look forward to future improvements.
I have to say that the biggest 'cool factor' I've had is in using that 'new' 1913 dictionary that was posted to do lookups. Since I've mainly been reading Dickens [Thanks HarryT
], there are quite a few older and rarely used words that I've needed definitions for.