Installed the Snow Leopard upgrade on my mid-2007 MBP last night and everything seemed to be fine after the install. That is, until I unplugged the power cord while the MBP was hooked up to an external monitor. The MBP went to sleep never to wake again. It doesn't even boot up anymore; the power light comes on, but nothing else happens, no matter the C, R, X, or **** keys I press during boot-up. It won't even let my Snow Leopard CD out (I pressed the shift and eject keys during boot up to no avail). I have Apple Care, so I brought the MBP to the Genius Bar. They said the computer is toast but they won't repair it. What the @#*&@? They said there are signs of accidental damage. The computer is 2.5 yrs old, has a few scratches on it, and has some bending (not dents) on the frame and a missing key, both of which are from our pet Quaker bird chomping on it. But the inner guts are not damaged. They are refusing service because of cosmetic issues??? If you have Apple Care, take good care of your computer... Evidently they look for any possible excuse to refuse service. No wonder Apple has so much cash in the bank!