I just got a new job, and i have to provide my own laptop. i have a powerbook 12" 1.5ghz g4 currently. however, the new job requires windows and windows software (i.e. - programs only designed for windows, etc...). so, my question to you, does a macbook run windows effectively enough to run most if not all types of windows software? i know i'll need to install xp or vista as well, i just want to make sure that the macbook will be efficient in this type of windows environment. any help, advice, or suggestions would be much appreciated. i just can't picture having to buy a pc. bleh. Thanks!