I'd consider a PPC board if it ran AMigaOS or Morphos and if it were the same price as a comparable Intel board. The first is possible, the second is not. I'm not at the stage of my life where I cant throw a thousand bucks at a hundred dollar board...
And because you cant afford it, you have to post the same rant over and over again? What are you trying to accomplish? Magical summoning of MorphOS for x86? Or drop dead cheap PowerPC mobos?
(Btw, you can get the latter by buying for example a Bubba Two (google it) and adding a mini-PCI graphics card, for example there's one with ATI Rage XL. Presto... an el cheapo "desktop" PowerPC based system (333MHz e300c3), with 256MB RAM, gigEther, SATA, fast USB etc.)