I have heard rumor of possible G4 cube and compatible upgrades rangeing from dual 1Ghz dual 1.2Ghz and dual 1.6Ghz, any proof is most helpful.

Where did you hear this?

One of the various Cube sites I was on, I can't remember wich one though.

Why would Apple try another cube? The first one didn't sell.

Not a new Cube, Cube upgrade cards, the Cube is a very versatile machine if you look into hotroding it like I am.