So far I'm really happy with my new 2.53 ghz MBP. I'm averaging 3.5 to 4 hours of battery life in OS X, but when I switch over to Boot Camp running XP SP3, I get about a single hour of battery life after a full charge. This occurs even when my display is set to be fairly dim. Is anyone else experiencing this? Any solutions? I do have the 7200 RPM 320gb hard drive, but I can't believe it would be the sole cause of my poor battery life. Thanks in advance.