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.

Regards.
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Dave Sawyer
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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