The official PlayStation 3 backward compatibility page is nowupon the U.S. PlayStation website. Apparently, Sony doesn’t want people to see the entire list of games that don’t play properly on the PS3, so all this page has on it is a Search function which requires you to input the title of the game you’re looking for.
However,CVGreports that there are about 200 games that don’t function correctly on the PS3 as of now.