I just saw this photo an animation on spaceweather.com that I though was really kinda nifty. I've never seen Venus cast a shadow or even thought of trying. But it really is bright enough to do such a thing.
Here is a photo of the shadow of the camera on a tripod casting the Venus shadow on a white surface. Pretty impressive! The photo is taken by French photographer, Laurent Laveder, who has had some pretty amazing photos published on the site before. Check out his site.