Triggers after wall post is created.

<?php
function my_component_init(){
		ossn_register_callback('wall', 'post:created', 'my_component_cb');
}
function my_component_cb($callback, $type, $params){
        //$params[guid, type, poster_guid]
		error_log(print_r($params, true));
}
ossn_register_callback('ossn', 'init', 'my_component_init');