I'm going to be getting an Intel iBook in september (it's is a gift for going to uni). I'm mostly going to be working on my iMac, and then use my iBook as a portable work point. Basically a copy of my iMac (same user, same documents and things) that I can carry to the library or take home for a weekend. And when I get back to my iMac I'd sync it and then continue working there. I've got no idea on how I would go about this, but it's always good to know in advance .