What is the most powerful Mac capable of running Mac OS 9? I know that there was a period of time after Mac OS X came out that new Macs still shipped with Mac OS 9 for a number of reasons (OS X was buggy, better compatibility with Classic apps, etc). This is more of a curiosity than anything, but I'm wondering what the most powerful Mac capable of running Mac OS 9 is, and what the maximum specs are.
According to Wikipedia, the Power Mac G4 (Mirrored Drive Doors 2003) is the newest and most powerful computer that can run Mac OS 9.

1.25 GHz PowerPC G4 (7455/7455B); can hold up to 2 GB memory (although OS 9 might not recognize all 2 GB).