O, sages of the Internet... I've been using a MacBook Pro (Core 2 Duo, 15", 2.13 GHz) for over a week now, and I notice that I'm unable to wring more than about 2 hours battery life out of the 'book. I don't do much on it except run Firefox, iTunes, and Google Desktop Search, and yet battery life stinks (all of the marketing material suggested it'd last about four hours). So... is there something wrong with this 'book, or is this typical? What can you MacBook owners tell me about your experience? Thanks in advance!