Because they're so cheap and so many of the netbook use cases fit in just fine with a primarily-Mac environment: no need to switch from your main Mac if you're

Because they're so cheap and so many of the netbook use cases fit in just fine with a primarily-Mac environment: no need to switch from your main Mac if you're just adding in a little box that can go on a trip with you, access internet services, and sync some photos from a camera.