You see MANY times that people update their nodes with useful info, or change wrong info into correct info, etc...

But, you really don't know when this happens, which is a shame. I think it would be a nice feature to add a "Significant Update" checkbox to the edit page, much like when we update our home nodes. This way, if someone adds a good amount of info to a node, they can click that, but if they simply change some typos or add something that isn't too major, they don't check it. Then, the node can reappear on the Newest Nodes page, but with some way to know it is an update... or even a new section called "Updated Nodes".