It's interesting, that's for sure. Their basis for the "no computer compares to it" remark is that everything in it is overclocked. That also reduces the life and the reliability of the components, though. The overclocking can be done at home, fairly easily with the right cooling, nVidia even includes overclocking settings in their standard video drivers. And, the "supercomputer" term comes from the fact that any computer past something like 700 MHz or something slow like that is considered by US law to be a "supercomputer" and because of that has export restrictions. I dunno, that was a couple years ago when I got my old Athlon 850 and thought it was funny that I was technically buying a "supercomputer" and was forbidden from taking it on a plane to Russia or something. (even though it was probably manufactured close to China)
There's also no multiprocessing going on, just an overclocked P4. They use a pretty standard gaming graphics board too, not a professional graphics board like a FireGL or a Quadro-FX, or something truly powerful like whatever came off of the old Oxygen line that had symmertric multiprocessing graphics chips on it.
Anyway, not to be a major bubble-burster or anything... they still have some nifty stuff in there, just not much of anything that makes it more powerful, or worth the price they're asking.
Except the monitor. I would give my left nut for one of those.