The new Airport Express does not support non broadcasting SSID as confirmed by Apple support. Virtually all of Apples other products allow you access a non broadcasting network by just entering the name one time in network settings. This allows you to hide your network by selecting to not broadcast the SSID (your network name) on your wireless router so others cannot see it with their computers, phones and laptops etc. My six year old Airport express supports this however I cannot imagine why the new one does not. Very disappointed. Why did they leave this out?
Non-broadcasting SSID are just about no security at all.