My Acer Aspire One (sans optical drive) was a pretty good secondary computer, until it broke. The 10" netbooks are extremely cheap, super cute, and really easy to carry around. For me, the only downsides are that the screen is small and the trackpad is annoying---if you use netbooks for long periods of time, it's more likely that you will be conscious of the computer's limitations than if you were using a big-ass laptop.