Dude, that thing doesn't (and never will) exist. It is a hoax.
And look at the picture. THAT COMPUTER IS A 3D RENDERING. It's not even a real picture! Somebody with 3DS Max and too much time on their hands make up some damn mutant microphone design and decided to call it a 1200 MHz G4. --Which, BTW, is FAR FAR FAR from ever being possible. The G4 is not capable of that kind of speed in its current state. Hell, it took them over a YEAR to get up to 500 from 450! Remember that? No way in hell you are going to overclock a G4 processor 250%!!!! HAHAHAHAHA TWO HUNDRED FIFTY PERCENT!!!! HAHAHAHAHAHAAAAAAAAAAAAAAAA. Damn, dude.
Oh, and not to mention the fact that APPLE WILL NOT ALLOW ANYONE TO MAKE MAC CLONES. They did away with that YEARS ago. The ONLY PLACE you are going to get a Mac (or mac-compatible) is from APPLE. End of story. That page is a joke.
Ricky
DesignDawg