The reason that palm does not work with 64 bit vista is that palm has not yet written a 64 bit usb driver. (after all this time, shame on you Palm!)
If your Palm supports bluetooth, you can sync with vista 64 via bluetooth. (Microsoft did write a bluetooth driver for vista 64)
Nov 20, 2008 Rating
Vista Lovers Stay Away from Palm by: Anonymous
The real problem is Palms failure to support it's users. This is not restricted to just the Vista 64 issue.