Boorgle is a way to be sure that the details of your contacts are always up to date.
Simply because each contact can update his own phone number, mail and address.
Now there is no need to send mass emails notifying your friends of new number or calling to ask the address when sending flowers. Your contacts and friends will always have your number and full details that you have provided.
Boorgle pushes all the updates to your gmail account so your native device address book is synched.