This info should be in your address book or iCal. Take a look at your settings for syncing in iSync. I don't remember what settings are there since I don;t sync my cell to my computer at work. Check both the general Preferences and select the phone icon and see the settings.
Add something to the address book and see what happens.
Generally if you have items on your cell, they would be added to Address book and iCal accordingly.