Official PS3 Backwards Compatibility Site Launched
November 20, 2006 - Sony Computer Entertainment has created an official backwards compatibility checklist site for looking up the compatibility status on PlayStation and PlayStation 2 titles. Rather than printing a flat list of 8,000 or so titles, Sony has created a search engine that allows you to look up any PSone or PS2 game and it'll tell you if it has any problems and what they are.
For instance, when searching for ICO you'll find that "Throughout gameplay and FMA's, the screen flickers." And when looking up Final Fantasy XI you'll find that "Users are unable to play titles that require HDD for PlayStation 2. This condition is planned to be resolved in the future with a system software update for PS3."