The MacBook Airs are in Apple Stores. If you have one near by, you should head over and check them out, they are really impressive. None of my photos turned out that well – I only had a camera phone and everybody was crowding around, it being lunchtime and all.
James Kendrick on the other hand, has some great side-by-side comparisons of the MacBook Air to HP’s 2710p
iFixit has what is the first tearing apart of a MacBook Air: