Missing Sync would be your solution for Now X as well. The difference is that you will sync your Palm with iCal and Address Book and Now X will pull the information via Mac OS X Sync Services.

Dave Sawyer
iMac 24 2.8GHz Mac OS X 10.6.2
PowerMac G5 2GHz DP Mac OS X 10.5.8
Windows XP, Vista and Windows 7