As far as projects go, you end up with a very well dressed MacMini, that along with an ADC Studio LCD monitor, with DVI Adapter, it would be a superb machine on any workstation.
Is it still a Cube? That is THE question. If I had a spare (non working) Cube, it, and a matching monitor, it would be on my desk at work so fast. . . . .
Would I gut a working Cube to do it, not a chance.