Posts by Author

$result = pingfm_post(t($node->pingfm['format'], $replacements), $node->pingfm['method'], $node->title);

Should be:

$result = pingfm_post(t($node->pingfm['format'], $replacements), $node->pingfm['method'], $node->title, user_load($node->uid));

So that posts are submitted by the original author of the node. Thanks Dmitri!