I've got a http://www.amazon.com/ASUS-UL80JT-A1-14-Inch-Laptop-Black/dp/B003UNMVRO http://www.amazon.com/ASUS-UL80JT-A1-14-Inch-Laptop-Black/dp..., which looks

I've got a http://www.amazon.com/ASUS-UL80JT-A1-14-Inch-Laptop-Black/dp/B003UNMVRO http://www.amazon.com/ASUS-UL80JT-A1-14-Inch-Laptop-Black/dp..., which looks like equivalent specs but on a 14 inch screen. It's been great so far (had it for almost a year), and IMO what an ultralight really should be. The battery life really is phenomenal: 10 hrs vs. 7 hrs sounds like a moot difference, but after you look at "usable" numbers (8 and 5, in my experience), it boils down to pretty much a full day vs. not quite. As a student, I never have to worry about grabbing my power cord on the way out, compared to everyone else I know always having one on hand. On the other hand, OS X really is a big selling point. Windows simply isn't natively compatible with what I need, and Ubuntu is a pain with consumer apps (Office, Adobe CS5, Mathematica, etc.) My cheap solution? Virtualize Ubuntu under Windows with VMWare Player and VMWare Unity (which is free). I do all my coding and dev work in Ubuntu, and everything else in Windows.