There is a post in the Facebook Developer Forum asking how to allow users sending private messages to their friends from a Facebook application.
Well, if you own a smart phone, you probably have found this feature in one of your mobile applications / non-official Facebook clients. FYI, this is possible…. however, this is not for the public. As far as I can tell, you need to get a private API from Facebook!
Too bad? I don’t think so! If this API were made public, I believe my inbox in Facebook will simply be flooded with those spamming mails.