Also after doing a little poking around there are a few Palm devices that will work with Vista.
Palm Centro; Treo 755p , 700p, 680, 650
Palm TX, Z22; Tungsten E2
If you are unable to Sync through a USB connection you should be able to get it done via Bluetooth.
I understand this isn't an option for the older models.
Here is the link to Hotsync 6.2