gistfile1.js

var api = new FB.Messages();

api.login("koenbok", "password", function(result) {})

api.threads.fetch({limit: 100, tags: ["inbox", "unread"]}, function(results) {}) // list with threads
api.threads.count({limit: 100, tags: ["inbox", "unread"]}, function(results) {}) // thread count

api.messages.fetch({thread:thread.id}, function(results) {}) // all messages for thread
api.messages.put({thread:thread.id, parent:message.id ...}, function(results) {}) // send a new message

api.events.subscribe("new.message", function(info) {}) // get notified of incoming messages