Thought this would be helpful to those of you wondering about the 11" MBA's undersized trackpad. I just got mine in today and have to say that I definitely notice the smaller trackpad, but I don't think its a huge issue and I'm sure its something that I won't even notice a month or so from now. The problem is that I'm accustomed to placing my hand a certain way with my thumb resting on the edge of the laptop which puts my fingers about 2/3s of the way up the trackpad. Of course this doesn't leave me much room to move upward. Over time I'm sure I'll get used to it and learn to position my fingers a little lower on the trackpad.
Here is a photo of my hand on the trackpad. My hands are roughly 7" tall from bottom of palm to tip of middle finger.
Here is a photo of my hand on the trackpad. My hands are roughly 7" tall from bottom of palm to tip of middle finger.