[DMcCunney]

Plucker, here, on a Tapwave Zodiac 2, though I also have eReader and MobiPocket for the odd content in those formats. I also have PalmFiction and WeaselReader installed.

Plucker is wonderful if you have content in HTML format, as it supports hyperlinks, embedded images, text attributes, and (on Palm OS5 devices) fonts. There is a lot of HTML formatted content out there. I have a good bit of Project Gutenberg, the entire Baen Free Library SF/Fantasy catalog, and a good bit of Gnu/Linux documentation. All told, a bit over 2,800 books occupying 1.4GB of a 2GB SD card. And Plucker is free and open source.

For non-HTML, I like PalmFiction Also free and open source (and written in a PalmOS version of Pascal, no less.) PalmFiction handles Palm "doc" files, zText files (plain ASCII files compressed with a Palm version of Zlib, for gzip compatible compression), plain ASCII files on an expansion card, and RTF files on a card (which it renders as plain text). The home page is in Russian, and there aren't really any docs for it, but there is an English version of the reader, and getting it configured is not hard.

I don't like proprietary formats and DRM. I want to download content once, and read it on whatever device I happen to have. I don't want to have to maintain multiple readers to handle all of the possible content I might wish to read, and have to remember which content is in which format read by which reader. I hope that some day ebook publishers will agree on a common format. Competing to make their format the default is nonsense. They should be competing on the quality of their lists.

Meanwhile, I sidestep the issue with Plucker. I can't read DRMed content that way, but no matter. There is more in HTML format suitable for conversion to Plucker than I have time to read, not to mention a stack of unread "dead tree" editions large enough to cause injury if it fell on me, so I'm not exactly missing out.
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Dennis