Yahoo! Autosync synchronizes the information you store with Yahoo!—in Address Book, Calendar, ToDo List, and Notepad—with your desktop personal information manager (PIM), such as Microsoft Outlook, Outlook Express, or Palm Desktop. It’s an upgrade to what used to be known as Intellisync for Yahoo!

Yahoo! Autosync compares your Yahoo! data to the data in your PIM application and makes whatever changes are necessary in either system to make sure that they both contain the same data. That way, when you add or delete something in one system and not the other, Yahoo! Autosync adds or deletes it in the system that needs updating. Sweet!

Are you an advanced-level PIMmer? If yes, get this: Yahoo! Autosync allows you to customize the software. Specify individual field mappings between systems and specify a limited date range to transfer. You can also turn off synchronization for completed "to do" items. But please be aware that any incorrect modifications to the advanced settings could cause data loss.

Finally, for those of us who have howled at the moon over a vanquished hard drive, Yahoo! Autosync also has a restore function, which is basically a built-in aversion to deleting vast quantities of data. If, when it attempts to sync your systems, Yahoo! Autosync notices that you’ve deleted many items in your PIM, you’ll have the opportunity to check a box that says, “Wait! Don’t delete any entries. I want to restore”.