I'm not committed, but I'm definitely interested.
I moved from a 13" Macbook Pro to an iPad because I wanted portability, but the keyboard simply doesn't cut it for day in and day out typing work.
What I love about my iPad is that it is something that I not only can take anywhere, but also something that I want to take anywhere with me. So yes, I have this great device that I'll take anywhere, but I simply can't accomplish all that much with it...thus, my interest in a Macbook Air.
I know that I wouldn't bring a 13" notebook with me, but I might bring an 11" notebook with me.
Either way, it'll come down to battery life and price point. If the battery life is adequate for all day use (6-10) hours, and if the price point is around a grand, I'll definitely be wanting one.