My laptop suffered terminal system failure due to the gravitional attraction of the Earth. In other words I dropped it. (I blame the cat) Anyway I'm thinking about replacing it with a "Netbook" I know I'll have to get an external USB optical drive if I want to load softwear on it, but other wise how do "Netbooks" differ from regular laptops? Aside from size of corse. I have been ogeling a Sony Vio (sp?) netbook. Thanks..