If you have any previous searches in your history or can find one online you can still get results. It looks like only the main page is down.
For example, this Newark search still works
http://www.kayak.com/h/buzz/view?ac=...NearbyAP=false
and you can change the airport to what you need it to be.
Change the airport code in the URL, it doesn't seem to work that well in the pull downs on the form on the buzz page.
If they are removing they did not remove all of it, so I'm hoping there's still some hope for it, and it was just a glitch they are trying to work out.