I've got a netbook (Acer Aspire One) and use it quite a bit for tethered shooting, controlling telescopes remotely, image download, light image editing etc. All good for that sort of thing. Just don't throw any serious number crunching at it - like stacking images, HDR maybe, games using lots of 3D/OpenGL type graphics. It's wonderfully compact and cheap to take on holidays to download photos and maybe do some editing. Just be aware of the screen resolution - they're typically 1024x600 max resolution and some applications (like DPP IIRC) require 1024x768 or better to run. You can install a free application that fools the netbook into thinking it has those higher resolutions, and the screen just scrolls up and down, but it's a pain in the neck to use extensively.