Nothing written already, but you could experiment with 'php scripts/console.php' and (from the top of my head):
$url = 'https://social.umeahackerspace.se/api/statuses/user_timeline/2.atom';
$post = file_get_contents($url);
$feed = new DOMDocument();
$feed->loadXML($post);
$oprofile = Ostatus_profile::getKV('uri', 'https://social.umeahackerspace.se/user/2');
$oprofile->processFeed($feed, 'manual');

Would be interesting to know if it works with individual notice feeds too, like https://social.umeahackerspace.se/api/statuses/show/213703.atom