That's great - but proxying the entire yahoo news page at the very least appears seedy (and you'll probably end up with google turning the screws on you). I understand if it's experimental but you can't just reflect everything.
We think this actually is helpful to the content owner, in our opinion, as it allows more access to their content.
The honest way of accomplishing this is to just link to the page.
Everything is preserved in the original site. It helps the content owner by making more of their content accessible to the users.