Don't worry. I will keep everyone updated

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The book came with a fairly decent sized library on it already. Quite a few Arthur Conan Doyle, Charles Dickens, Mark Twain and others. One thing I found amusing though was that Moby Dick was included (not the amusing part), but it was placed in the Children's literature section of the device

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One slightly annoying thing I have noticed so far, and this I think is more a Mac issue (I will have to test it with my Linux Box tonight) is that when I tell the Mac to eject the device, it will remount it several seconds later; if I am ready to unplug I have to re-eject.
I did download a couple of .fb2 books last night; I had already converted 1633 by Eric Flint and David Weber. That loaded like a champ. I also loaded David Weber's The Honor of the Queen. Had a little more difficulty with that, but I did discover that for .fb2 books, one doesn't need to follow the author_name#title format. It reads the info from the file.
There is plenty of latitude for adjusting the font size. I am not sure if their font size listings are accurate; their 12pt type (the smallest on the device) looks rather small to me (indeed it is the smallest I can imagine anyone comfortably reading with). I personally find that 16pt provides plenty of text on page.
Also, my general observation is that txt and .fb2 page turns are faster than the pdf page turns, though I haven't tried timing it yet.
That being said, the one caveat I have about this reader is that it really does need to add support for other formats. If it could support the ePub books that Stanza creates that would be great; html might be even better. And certainly I wouldn't object to eReader. I still hope they don't support DRM (Though I wouldn't mind eReader's too much). As it is, its not hard to convert a book to .fb2, but it is not exactly something that a non-technical person would be comfortable with.
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Bill