So, I'd like to build a netbook and/or small laptop to use for school work. I have one that I use now, but it runs pretty laggy. Since I'm majoring in computer science, I run Eclipse on it a lot, and that seems to put a pretty heavy strain on the system.

Does anyone have any experience with this? I'm looking for any advice in general, but right now I'm even having trouble finding netbook/laptop cases. I recently built an HTPC using stuff from NewEgg, but I'm not having any luck fining appropriate materials there.

Would love any input.