Patch Noifications

A thread on another list I follow talked about server uptime, and reboot requirements due to patches (security). The understood result at the end of the thread was that the only time a reboot was required was after a kernel patch. My questions is two fold. First is this group aware of any other patches that would require user interaction. For example if I have set up automatic updates, in what instances would I need to reboot and/or manually restart a damon. Second question, if there are any user interaction from previous question, what method of notification (email) is there to notify an admin of the requirement (otherwise the machin is not protected for that security vulnerability). Thanks, Ron