I have a Palm Vx and I have been using the pilot-link.0.9.3 you can download it from Hobbes at
http://hobbes.nmsu.edu/cgi-bin/h-viewer?sh=1&fname=/pub/os2/apps/pim/plk093.zipIt is good for backing up the palm and installing files etc. I have not used it for sync. There may be some more recent ports available. This is a Gnu package. You can also speed up the transfer of files with an envirnment variable setup. look in the docs.
I also found some links here for a pearl program to sync and more
http://www.perelin.de/stellarcom/palmstuff/