This isn't the only way to increase your Macbook's storage space, but an intrepid fanboy has managed to fit his MBP with a RAID 0 setup using two 320GB 5,400rpm hard drives. Sure, his laptop is all Frankenstein looking now (the keyboard doesn't fit right, the lappie is noticeably louder, etc), but performance-wise he's enjoying quite the speed bump (and practically no battery life). The hack works on MacBooks, MBPs and PowerBooks.
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