The Latino Review came across a scoop while visiting the Hellboy II creature effects shop...
The SFX shop must have something to do with the X-Men Origins: Magneto movie because the Latino Review reporter saw a photograph (not concept art) of a young Hank McCoy.
The picture showed a younger guy in the Beast getup leaping down. He was in the full blue costume with his long tail and you couldn't mistake him for anything other than Beast. The picture also had 'Magneto' written in the upper corner. Like I said, I was only able to see it for a few seconds, but it did not look like a computer rendered picture, it looked like an actor in full makeup. Nevertheless, Beast IS in the movie.
Unfortunately I couldn't take a picture of ANY of this stuff because there were a lot of drawings and photos from Land of the Lost there as well. But this Beast information is awesome. Who else will be in the Magneto film? What other younger X-Men could make an appearance and what role could The Beast have?
CBM: Scooper Douglas reminded us that we don't recall Beast ever sporting a tail, but it could be creative license. This is interesting news nonetheless. Stay tuned for future developments.