Console Tribe, seems to have revealed a slim Xbox 360 alongside a renamed Project Natal, touting a 250GB HDD, built-in WiFi (it's the future!), and compatibility with "Kinect" -- presumably the new name for Natal. The advertisement leads back to the Italian Microsoft site and the source of the page tells us that Atlas Solutions -- a Microsoft-owned ad company -- pushed the image automatically to the site.
We've checked in with Microsoft to see if the news is legit, but we're not expecting much before tonight's Project Natal Cirque du Soleil "spectacular." In the meantime, you can check out the ad embedded after the break.
Update: The ad we embedded after the break seems to have been pulled, so we've added a video in its place.