i've been holding out for a while mostly because I currently enjoy using windows. However I'm interested in developing apps for the iphone and need a smaller notebook than my current one so I'm considering a macbook/mbp. I still plan on using windows via bootcamp because I have to use arcGIS, which currently has only windows versions. however I have some questions: if I install Windows 7 via bootcamp, I imagine there will be two different partitions and both will be formatted differently right? is it difficult to transfer files from one partition to the other? say I save a video file while in windows 7, but want to open it up on the mac osx side. if i buy an external drive for it, what should it be formatted in? thanks for your time.