So I'm writing the feature that lets you specify what fields you want and will pass the resulting FB object directly back to you (edit: now done and in the trunk).

However, you can't get the email addresses of friends. From https://developers.facebook.com/docs/reference/login/email-p...: "Note: There is no way for apps to obtain email addresses for a user's friends."

Oh, well, that kind of makes sense but it's a bummer anyhow. I guess it would be pretty easy to send them an invite on facebook via wall post or message though.