Any thoughts of the performance of a netbook versus an old iBook? The iBook is 5 or 6 years old (800 MHz G4, 680 MB of RAM). It was main computer for quite some time, but I upgraded to an iMac. I still use the iBook for web surfing, light word processing and spreadsheets and to watch the occasional DVD. It's starting to show its age as of late and while I'd like to upgrade, I don't use it enough to justify the cost of a Macbook, nor do I really need a full featured work horse.