Yesterday we ran across a video of HTC Sense running on Windows Phone 7 as a hub over at Pocketpt.net. Apparently, HTC has requested that the site pull the video, giving things a little more credibility.
The site commented (translated), "Unfortunately, HTC did not like to have seen the video of its new interface released before it was officially presented, and I was warned that this could have legal repercussions for both the PocketPT either to the author of the article. To avoid any legal embroglio decided to remove it."
While this video was pulled, if you missed it, the demo video is still circulating (for now).