Earlier today, Facebook released an update to its iPhone app, and introduced a slew of long awaited features, such as the ability to unfriend people directly from your device. The update also allows you to check in to events that you’re attending, and offers a much better way to locate your friends at events and venues, as the app now offers detailed maps with your friends’ precise location, instead of a high-level list of places. The feature works great, especially if you happen to be in a large venue such as a concert arena, and need some help to find your friends in a massive crowd. As always, the app is free. For more details about Facebook for iPhone, click here.