the iPhone/iTouch is the netbook you are looking for. I have an iPhone and Asus Eee PC. the iPhone does more out of the box, better, smaller and more portable. You can customize the iPhone/iTouch with the free apps from the AppStore.
Apple totally rethink the way portables work and interface while netbooks are just smaller crappier Windohs. Apple has to change the way the majority thinks about conventional computing.