Here's what you've missed this week:

• Facebook Rolls Out Trusted Contacts - It's common practice to give out spare house keys to a few trusted friends in case of an emergency, but would you take the same approach when it comes to backing up Facebook login information?
• Instagram Adds People-Tagging to Photos - Instagram is adding one of Facebook's most popular features — photo tagging — to its iOS and Android apps Thursday. You can now tag people in photos, and browse feeds of photos you and others appear in.