this post is for all of the college students out there who own a 15" powerbook!...as most of you have probably encountered, the "desks" (and that's being generous) in most lecture halls are teeny tiny...i've been interested in both the 12" and 15" powerbook (but mainly the 15"), but i'm worried the 15" will be too large to take to class with. Is it? or is it manageable? Someone was using his 12" iBook today during a lecture and it was a perfect fit on the desk. However, i don't want to get the 12" JUST for the sake of taking it to class...I've used a 13" monitor on my desktop computer for years and years and i would like to get a larger screen, which is why i'm not too much in the running for a 12" anymore. any comments would be appreciated. thanks!