eGroovy – Worry-Free Online Address Book
http://www.egroovycontacts.com/

Have everyone’s addresses, emails, instant messaging, birthdays and phone numbers more easily accessible from anywhere. Call it your online address book. Whenever your linked contacts change their data, be it a phone number or address etc., you will be instantly notified insuring you never have to update your contact list again. Why start your address book from scratch. Quickly import all your contacts from Gmail and Hotmail. All imports are automatically organized in minicards.