I saw this mod on bit-tech and figured I'd share it.  It would be great to see more mods like this for Mac's. 

http://www.bit-tech.net/modding/2007/05/08/BaDassumption_part_1/1.html
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MacBook 2GHz Intel Core 2 Duo w/ 2GB DDR2 RAM & 120GB SATA 5400RPM HDD
Canon Rebel XTI
Google Cr-48 Beta Laptop