i just remembered this, im pretty sure that once on ebay there was an ibook that was a G3 case modded to be clear with a G4 mobo in it. maybe the guy was lying, i dunno, but he was selling a G4 in a g3 case.
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15.4 in matte Macbook Pro, 2.4 Ghz, 2 gb, 200 gb, 256mb 8600m GT.
2 Ghz Celeron, 2 gb, 40 gb, 128mb fx5200, ubuntu based file and print server.