So, I had a thought to make my own mac. Now there are lots of different ways to go about this, and from my research, these seem to be the best:

• MacOpz wants to show you how to make your own G4. Outdated, but still a nice tutorial.
• Lifehacker has detailed plans on building a “hackintosh” for under $800. However, you can actually do this cheaper by using less RAM and a smaller Hard Drive.
• Build your own Mac Mini. Actually, this computer might be more powerful than a Mac Mini.
• iHacked has a nice step by step of getting a DIY Mac up and running as well.

I hope these are helpful to you. I’ll post more as I find them.