Sony posted their Backwards Compatibility List for the PS3 today online. It’s very detailed about what’s going on with PS1 and PS2 games as far as technical problems and where in the games they happen. You have to type in the name of the game to find it, which is slightly annoying. However, given the massive library of games available, it’s not so bad. Thankfully most of the games I own don’t have any issues (and neither do the games I plan on buying).