Not an ultra; but I was looking for something similar, I think to what you were looking for. Small, but still useable, light, fast, good build quality and hopefully cheap. I did a alot of research and watched slickdeals.com regularly for deals and ended up with an Asus 1215b with an E-350 processor. It comes with 2gb of ram, but I put another 4gb stick (22$) to bring it to 6; and replaced the hard drive with an ssd (…
What is the touchpad flaw?
http://www.youtube.com/watch?v=8ak20j48w1A
If you have ever used a non-laser tracking mouse on a wood surface you have a good idea of what its like.
What appears to be happening is that there is a short from the output of the touchpad to the motherboard. Removing the little piece of foil that appears to be 'grounding' the trackpad from the screw 100% fixed it (for me).