Findings:

• Opus IV
• Opus 40
• Si opus sit
• Penguin Opus (user)
• Chopin Polonaise: Opus 26 no.1 & 2
• Chopin Polonaise: Opus 40 no.1 & 2
• Chopin Polonaise: opus 44
• Chopin Polonaise: Opus 53
• Chopin Polonaise: Opus 61 (polonaise-fantaisie)
• Opus Number
• Ronald Opus
• cybook opus
• Doctor Korgon's Robotic Opus
• Posthumous
• posthumous (user)
• Posthumous Oscar
• Opus 3
• opus infinitum
• Opus Dei
• Marmoratum opus
• Opus
• Opus (user)
• magnum opus
• Mr. Holland's Opus
• Moog Opus 3
• magnus opus
• Beethoven Piano Sonata No. 7
• Directory Opus
• Opus 67
• Daemon Opus (user)

If you Log in you could create a "Opus Posthumous" node. If you don't already have an account, you can register here.