Nice! I don't NEED a new computer as of now, but I really want to build a Hackintosh some day. I have some questions to ask you, now that I have finally gotten ahold of someone who has done the G4-Hackintosh case mod! How did you build yours? I am aware that, first of all, you need to create custom risers/mounts for the motherboard, wire the new components to the original power button, and put a new fan in place of the old one (that main one that's attached to a whole bracket). And perhaps an extra fan somewhere in the case---I commonly see two configurations: A hole cut in the bottom of the casing, or a hole cut in the side of the casing (at the back of the G4).
Other than maybe cutting the hole larger for the new power supply, I am not sure of the best way to go about this. What was the most difficult part for you? I think it would be cool to have a Hackintosh in a miniature case, but I may consider putting one in a G4 case.
The PPC community will always be here to help---we all like answering people's questions, giving advice, etc. Would you mind showing some pictures of your machine w/ some explanation on how you built it?