Is there a way to have lock screen notifications which notify only that an activity has happened (SMS message, Facebook message, etc.) but doesn't show the content of that activity? (I suspect there isn't, but thought I'd ask just to make sure.)
The idea behind this is that sometimes incoming messages contain personal or otherwise private information. And while I'd like to have visible alerts that messages have arrived, I don't want that information displayed without being able to unlock the device.