My wife wanted a 12" notebook, not a netbook, and this was before the airapples were available. I found her a 12" Toshiba, very light, with dual core processor AND a DVD drive. It cost about $1300.
A couple of years later I bought a 13" Toshiba for $550, almost equal to hers. A little heavier, a little wider, no DVD drive, equal performance. It is great for me for travel. I would like a slightly faster processor, more battery, an SSD and a better keyboard. The styling of the machine is great. ASUS had a competing model that was more money. Today I might be able to get all that I want in some of the business class ultraportables, for a little over the $1000 price. For now I'm just considering putting an SSD in mine and living with it.
Thinness is really at the bottom of my wish list. I want light, good battery, and good processor in that order. Today's small ASUS is the U31 and it seems to provide 90% of an ultrabook, for a much lower price.
The styling is generic but sleek enough, it needs to be a bit lighter, and I would prefer an SSD.