We have just completed a test of an IBM 750FX PowerPC CPU in a Cube. The 750FX is a very low power device which means there are no fans or beefy DC/DC boards needed. And it's fast...take a look at the benchmarks comparing the 750FX at 900MHz to a 500MHz G4 (these done in a 100Mhz bus PowerBook Pismo.) http://www.powerlogix.com/products2/performance/pismo.html The clock speed of the 750FX more than makes up for the lack of Altivec, see the iTunes rip comparison. Any interest in this? Robert --