Contact information (e.g. email addresses, phone numbers) will not be available through the API anytime soon. The idea behind this is that there is a huge difference between allowing my friends to see my email address, and allowing applications logged in as my friends to see my email address. I don't trust my friends to be able to decide which applications they trust with my information.

Looking at it from another way: like the rest of the world I receive a lot of spam. This is because my email address was harvested once by a virus on a computer of one of my friends. So again, if I have friends that manage to install virusses on their own PCs, I'm not going to trust them to only allow benevolent applications to see my email address.

Last part of my argument is that in general contact data is needed to contact people. Even applications with the most benevolent intentions can send emails that are perceived spammy by users (I'm sure you've received your fair share of email that was probably sent with the best intentions, but that you really didn't want to receive). So we don't see how we can share contact data while at the same time protecting our users against spam.

If you want contact information on the logged in member, the best way is to just ask them for their email address. I'm sure if they're willing to share that, they won;t mind typing it in.