I purchased an Intel-based Mac out of pure need. For some reason my iBook G4 would not start with the AirPort card in it, but would with the card out of it. (The Apple Store Genius Bar figured this out, not me.)
So I'm in the middle of adjusting this new Mac, while the "old" one is being fixed by Apple. I'm excited to have two computers and will dive into doing some neat things with them.