Not a bad idea but now your asking your user to embed these tags into their existing static pages; if I have to edit my static pages just to use your tool, why

Not a bad idea but now your asking your user to embed these tags into their existing static pages; if I have to edit my static pages just to use your tool, why not update the contents while I'm there and bypass your tool? Maybe I was misunderstood, I am talking about changing content of the site in realtime if it was updated in time. That is why there have to be some server which is reading all the time content of given page and if there is some change then notifies given user. It would be tool for public pages - news sites, rankings etc.