After opening an iBeacon app we hard closed it: not just putting it into the background tray but swiping it closed entirely. The phone still detected beacons and sent a message through the lock screen, something which in the past was reserved for apps that were at minimum running in the background tray.
This is a great release. I own the Trackr product and it looses connection to the iPhone all the time. If this gives some needed improvement in use I am a happy customer. I like the product a lot. When it works it really does work. BlueTooth LE is still flakey.
iBeacons is a interesting technology that would give us in doors location services, plus context awareness. These things will be used to send relevant information to us.