Tabber is an online address book; import your contacts from a range of sources (Outlook, Digg, MySpace, MSN, etc.), or add them manually; once you´ve got all your contacts, use Tabber as you would any address book. Update birthday info, mailing addresses, get Google map directions, and find out what your friends are doing. Tabber lets you know when your friends make changes to their info, on Tabber or on their blog or MySpace page (you"ll receive an instant alert). You can also merge contact info if one of your friends has several profiles with different social networks.