Well, not yet anyway.  uvisor chokes because the "get available bytes"
thing doesn't work at all; if that's commented out, the device comes up
as a Visor (not a PALM4) with 8 com ports, none of which work.  If I hack
it to probe as a PALM4, it doesn't even work that well.

I've heard rumors that the Treo 300 didn't work with Linux in February, but
may have been fixed.  I'd love to know if anyone's gotten either a 300 or a
600 to work; I have a 300, but I can return it if I can't make it work, so
I could do either.

-s