WANTED: Alive - no good dead!

Seth asked for off the wall, challenging new ideas, I’ve no idea of the practicalities of this one but wouldn’t it useful for web users to be able to see at a glance how “alive” a web page is. It’s no longer important just to know how many hits a page gets but how often it gets updated. A little icon / gauge could tell a viewer quickly if it was worth a live bookmark. I think it would help people grasp the concept of RSS and the extra value in sites that are regularly updated.