So I've got 512mb on my Window machine, and it runs great for what I do with it. When I get an iBook, does it make sense that 512mb (in total) will be enough as well? For me its not a matter of "buy as much as you can afford", its a matter of being thrifty without sacrificing speed. iBook uses would probably be limited to iLife apps, word processing, and wireless internet. No heavy photo or video editing. What do you guys think?