PS2 Classic Manager (& Placeholder) for PS3 by Captain CPS-X | PSX-Place
Free Mobile Gaming - PS3 PS2 Classics GUI version 1.4 App Download
For those interested: PS2 Classic versions of GTA III, Vice City, San Andreas (only in the Triology bundle, the stand alone is the mobile port), and Liberty City Stories are still available
How To Play PS2 Games On Any PS3 CFW - Consoleinfo