Canon has put up a page of sample videos from their upcoming 8-15mm f/4L fisheye lens. The first video, “With” was shot using 5D and 7D cameras. The second video is “With” Behind the Scenes.
According to CanonRumors, the lens probably won’t be available until January
Click for videos
Update: As posted on CanonRumors, this lens has been delayed until March 2011, along with the EF 300mm f/2.8L IS II USM, EF 400mm f/2.8L IS II USM, and new teleconverters that Canon announced last August.