Hiya guys, I'm currently waiting for my 12" iBook from Apple Education Store UK. What I'm wondering is, when I'm out of the house, without the powerpack, how can I maximize the life I'm getting out of my battery. I imagine there'll be some sort of control over the backlight, and perhaps some other features which could be tweaked? I'm also wondering, are there negative effects to having the iBook plugged into the mains too often? If so, what's the best way you've found to extend the total life you get from a battery (in terms of how long you can get without significant in the time for which it holds its charge). Thanks!