A search engine that only displays the original author's article and not all the other sites that have copied it.

Nothing worse than typing in a search term and you end up with hundreds of hits and yet when you start clicking on them they are all the same article just spammed across other sites. This way if you punch in a search term then when an article shows up it then has it's published date checked against other sites that have the exact same article. I'm sure this would probably put out of business most blogger sites that are nothing more than someone writing one sentence and then copy pasta someone else's work.