hi,
Farhan Here. I have worked with Google API that used to fetch address book. I love to work with APIs as I have a great experience in different APIs like EBay API, FedEX API, Amazon Web Service, Google API and QuickBook etc.
I can show you a demo application that use to fetch address book of a gmail account.
Plz let me know if u need anything more to know for your peace of mind.
thanks and best regards!
Farhan Anjum