Best way to associate phone numbers with names

Question

My application stores lots of its users friends' phone numbers. I'd like to allow users to associate names with these phone numbers, but I don't want to make users manually type in names (obviously).

I'm curious what the best overall approach is here, as well as the best way to implement it

Overall approach-wise, I imagine using Gmail / Yahoo / Windows Live contacts is best (the Facebook API doesn't let you access phone numbers), though the gems I've found for interacting with these contacts APIs (this and this) only give you access to the names and email addresses of each contact.

Answer 1

Most people don't have phone numbers in Gmail's contacts.

You can allow to import phone book via vCard or do smth to impot from iPhone/Android

Alternatively, you can write a custom parser for google's phone book or use gData API (not sure if it supports it)