If you're still within the return period, you could always call Apple and ask if they'll let you return the G4 iBook so that you can buy a MacBook.
Apple let me do this a couple of months ago, when the new Intel Mac minis had just come out... just the week before, I'd bought a G4 Mac mini. I called Apple and calmly explained that I would rather have an Intel Mac mini, and they allowed me to return the G4, with NO restocking fee. Got all my money back and bought an Intel Mac mini, which I'm much happier with (since it allows dual-booting between OS X and Windows).
Apple let me do this a couple of months ago, when the new Intel Mac minis had just come out... just the week before, I'd bought a G4 Mac mini. I called Apple and calmly explained that I would rather have an Intel Mac mini, and they allowed me to return the G4, with NO restocking fee. Got all my money back and bought an Intel Mac mini, which I'm much happier with (since it allows dual-booting between OS X and Windows).