I've a Palm Z22 and sync plus app is available on Linux, bought only a few years ago out of curiosity. The apps are also still available to download. I've two ereaders. One only reads one kind of pdb and the Mobipocket seems to read at least two kinds. I made the pdb files with Calibre. Naturally character set support is poor. However you can read a real ebook on it, though it's a bit like reading on a watch in terms of the amount of text.
The Z22 was already an obsolete nonsense when it came out. I guess it only sold at all because it was smaller and cheaper than better screen PDAs or Smart phones. I had the last 486 mono Nokia Communicator in 2000 and later had the colour ARM based on in 2001 or 2002. My last Symbian was an E65 slider which could run DosBox and ereaders, though a totally inferior version of Symbian to the last true Nokia Communicator with S80.
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