I've never noticed this before but today when visiting my parents they told me they had gotten new wifi. I found their network on my MacBook Air and entered the new password. A few hours later I grabbed my iPad and noticed it was already connected to the wifi. I pulled out my iPhone to check and yup, it was already connected as well. So I'm curious how this happened when I never manually connected to the new network on these 2 devices. Does iCloud synchronize wifi networks to all your devices after you've connected to them on just one device? I never noticed this before now (and I just got new wifi at home about a month ago).