Apple recently released 10.5.3 update for Leopard. One of the updates I’m excited about is the ability to sync Address Book with Google and Yahoo!. If you want to set up a sync with Yahoo!, view this page http://help.yahoo.com/l/us/yahoo/addressbook/autosync/autosync-20.html. For Google, visit this page http://googlemac.blogspot.com/2008/05/mac-os-x-1053-sync-google-contacts.html. The only problem I found so far is with Google and contacts that have “Company” checked on your Address Book. These contacts seem to show up as blank in the contacts list (http://www.google.com/support/contactsync/#anchor_link_9). But if you click on it in Gmail, it will display the information.